Fare Guide

Estimated lowest fares found within 7 days

Cheapest Airline Frontier Airlines

The cheapest airline(s) flying from Saint Louis to Boston is Frontier Airlines.

  • Frontier Airlines Frontier Airlines
  • Spirit Airlines Spirit Airlines
  • United Airlines United Airlines
  • American Airlines American Airlines
  • Southwest Airlines Southwest Airlines
  • Alaska Airlines Alaska Airlines
Cheapest Month February

Travel Period: February 2025 - January 2026

The cheapest month(s) to fly from Saint Louis to Boston is February.

  • Feb 2025
  • Mar 2025
  • Apr 2025
  • May 2025
  • Jun 2025
  • Jul 2025
  • Aug 2025
  • Sep 2025
  • Oct 2025
  • Nov 2025
  • Dec 2025
  • Jan 2026
Cheapest Day of the Week Friday

The cheapest day(s) of the week to fly from Saint Louis to Boston is Friday.

  • Sun Sunday
  • Mon Monday
  • Tue Tuesday
  • Wed Wednesday
  • Thu Thursday
  • Fri Friday
  • Sat Saturday

Flight Schedules

Last Updated: Thu, 2 Jan, 2025

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  • Availability
    • M
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  • 18:15 STL
    21:45 BOS
    2Hrs, 30m Direct
  • STLSt Louis Lambert Intl Airport 18:15 - BOS 21:45 2h 30m Direct
  • STLSt Louis Lambert Intl Airport 18:15
  • BOSBoston Logan International Airport 21:45
  • 2h 30m
  • Direct
  • Southwest Airlines (WN 3126)Boeing 737 700
  • Southwest Airlines (WN 3126)
    • -
    • T
    • W
    • -
    • -
    • -
    • -
  • Boeing 737 700
  • 20:40 STL
    00:10 BOS
    2Hrs, 30m Direct
  • STLSt Louis Lambert Intl Airport 20:40 - BOS 00:10 2h 30m Direct
  • STLSt Louis Lambert Intl Airport 20:40
  • BOSBoston Logan International Airport 00:10
  • 2h 30m
  • Direct
  • Southwest Airlines (WN 4422)Boeing 737 700
  • Southwest Airlines (WN 4422)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
  • Boeing 737 700
  • 07:40 STL
    11:10 BOS
    2Hrs, 30m Direct
  • STLSt Louis Lambert Intl Airport 07:40 - BOS 11:10 2h 30m Direct
  • STLSt Louis Lambert Intl Airport 07:40
  • BOSBoston Logan International Airport 11:10
  • 2h 30m
  • Direct
  • Southwest Airlines (WN 2357)Boeing 737 800
  • Southwest Airlines (WN 2357)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
  • Boeing 737 800
  • 09:30 STL
    13:00 BOS
    2Hrs, 30m Direct
  • STLSt Louis Lambert Intl Airport 09:30 - BOS 13:00 2h 30m Direct
  • STLSt Louis Lambert Intl Airport 09:30
  • BOSBoston Logan International Airport 13:00
  • 2h 30m
  • Direct
  • Southwest Airlines (WN 2357)Boeing 737 800
  • Southwest Airlines (WN 2357)
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    • -
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    • -
  • Boeing 737 800
  • 14:50 STL
    18:20 BOS
    2Hrs, 30m Direct
  • STLSt Louis Lambert Intl Airport 14:50 - BOS 18:20 2h 30m Direct
  • STLSt Louis Lambert Intl Airport 14:50
  • BOSBoston Logan International Airport 18:20
  • 2h 30m
  • Direct
  • Southwest Airlines (WN 3126)Boeing 737 Max 8 Passenger
  • Southwest Airlines (WN 3126)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
  • Boeing 737 Max 8 Passenger
  • 05:35 STL
    12:40 BOS
    6Hrs, 05m 1 Stop (MDW)
  • STLSt Louis Lambert Intl Airport 05:35 - BOS 12:40 6h 05m 1 Stop (MDW) Chicago
  • STLSt Louis Lambert Intl Airport 05:35
    MDWChicago Midway Airport 09:30
  • MDWChicago Midway Airport 06:45
    BOSBoston Logan International Airport 12:40
  • 6h 05m (2h 45m)
  • 1 Stop MDW · Chicago 2h 45m
  • Southwest Airlines (WN 3171)Boeing 737 Max 8 Passenger
    Southwest Airlines (WN 2666)Boeing 737 800
  • Southwest Airlines (WN 3171)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
  • 05:36 STL
    11:43 BOS
    5Hrs, 07m 1 Stop (ORD)
  • STLSt Louis Lambert Intl Airport 05:36 - BOS 11:43 5h 07m 1 Stop (ORD) Chicago
  • STLSt Louis Lambert Intl Airport 05:36
    ORDChicago O'Hare International Airport 08:20
  • ORDChicago O'Hare International Airport 07:05
    BOSBoston Logan International Airport 11:43
  • 5h 07m (1h 15m)
  • 1 Stop ORD · Chicago 1h 15m
  • American Airlines (AA 629)Boeing 737 800
    American Airlines (AA 314)Boeing 737 800
  • American Airlines (AA 629)
    • -
    • -
    • -
    • -
    • -
    • -
    • S
  • 05:45 STL
    11:26 BOS
    4Hrs, 41m 1 Stop (ORD)
  • STLSt Louis Lambert Intl Airport 05:45 - BOS 11:26 4h 41m 1 Stop (ORD) Chicago
  • STLSt Louis Lambert Intl Airport 05:45
    ORDChicago O'Hare International Airport 08:05
  • ORDChicago O'Hare International Airport 07:14
    BOSBoston Logan International Airport 11:26
  • 4h 41m (51m)
  • 1 Stop ORD · Chicago 51m
  • American Airlines (AA 629)Boeing 737 800
    American Airlines (AA 314)Boeing 737 800
  • American Airlines (AA 629)
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    • -
  • 06:15 STL
    12:07 BOS
    4Hrs, 52m 1 Stop (DCA)
  • STLSt Louis Lambert Intl Airport 06:15 - BOS 12:07 4h 52m 1 Stop (DCA) Washington
  • STLSt Louis Lambert Intl Airport 06:15
    DCAWashington Ronald Reagan National Airport 10:15
  • DCAWashington Ronald Reagan National Airport 09:19
    BOSBoston Logan International Airport 12:07
  • 4h 52m (56m)
  • 1 Stop DCA · Washington 56m
  • American Airlines (AA 5468)Crj 700 Canadair Regional
    American Airlines (AA 4635)Embraer Emb 175
  • American Airlines (AA 5468)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
  • 06:15 STL
    12:18 BOS
    5Hrs, 03m 1 Stop (DCA)
  • STLSt Louis Lambert Intl Airport 06:15 - BOS 12:18 5h 03m 1 Stop (DCA) Washington
  • STLSt Louis Lambert Intl Airport 06:15
    DCAWashington Ronald Reagan National Airport 10:40
  • DCAWashington Ronald Reagan National Airport 09:19
    BOSBoston Logan International Airport 12:18
  • 5h 03m (1h 21m)
  • 1 Stop DCA · Washington 1h 21m
  • American Airlines (AA 4360)Embraer Emb 175
    American Airlines (AA 2134)Airbus
  • American Airlines (AA 4360)
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    • -
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  • 06:15 STL
    12:21 BOS
    5Hrs, 06m 1 Stop (DCA)
  • STLSt Louis Lambert Intl Airport 06:15 - BOS 12:21 5h 06m 1 Stop (DCA) Washington
  • STLSt Louis Lambert Intl Airport 06:15
    DCAWashington Ronald Reagan National Airport 10:40
  • DCAWashington Ronald Reagan National Airport 09:19
    BOSBoston Logan International Airport 12:21
  • 5h 06m (1h 21m)
  • 1 Stop DCA · Washington 1h 21m
  • American Airlines (AA 5468)Crj 700 Canadair Regional
    American Airlines (AA 4635)Embraer Emb 175
  • American Airlines (AA 5468)
    • -
    • -
    • -
    • -
    • -
    • -
    • S
  • 06:15 STL
    12:21 BOS
    5Hrs, 06m 1 Stop (DCA)
  • STLSt Louis Lambert Intl Airport 06:15 - BOS 12:21 5h 06m 1 Stop (DCA) Washington
  • STLSt Louis Lambert Intl Airport 06:15
    DCAWashington Ronald Reagan National Airport 10:40
  • DCAWashington Ronald Reagan National Airport 09:19
    BOSBoston Logan International Airport 12:21
  • 5h 06m (1h 21m)
  • 1 Stop DCA · Washington 1h 21m
  • American Airlines (AA 4360)Embraer Emb 175
    American Airlines (AA 4635)Embraer Emb 175
  • American Airlines (AA 4360)
    • M
    • -
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    • F
    • -
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  • 06:30 STL
    11:45 BOS
    4Hrs, 15m 1 Stop (MDW)
  • STLSt Louis Lambert Intl Airport 06:30 - BOS 11:45 4h 15m 1 Stop (MDW) Chicago
  • STLSt Louis Lambert Intl Airport 06:30
    MDWChicago Midway Airport 08:30
  • MDWChicago Midway Airport 07:40
    BOSBoston Logan International Airport 11:45
  • 4h 15m (50m)
  • 1 Stop MDW · Chicago 50m
  • Southwest Airlines (WN 367)Boeing 737 800
    Southwest Airlines (WN 2666)Boeing 737 700
  • Southwest Airlines (WN 367)
    • -
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    • -
    • -
    • -
  • 06:30 STL
    11:59 BOS
    4Hrs, 29m 1 Stop (PHL)
  • STLSt Louis Lambert Intl Airport 06:30 - BOS 11:59 4h 29m 1 Stop (PHL) Philadelphia
  • STLSt Louis Lambert Intl Airport 06:30
    PHLPhiladelphia International Airport 10:35
  • PHLPhiladelphia International Airport 09:39
    BOSBoston Logan International Airport 11:59
  • 4h 29m (56m)
  • 1 Stop PHL · Philadelphia 56m
  • American Airlines (AA 5167)Crj 700 Canadair Regional
    American Airlines (AA 4499)Embraer Emb 175
  • American Airlines (AA 5167)
    • -
    • -
    • -
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  • 06:30 STL
    12:20 BOS
    4Hrs, 50m 1 Stop (PHL)
  • STLSt Louis Lambert Intl Airport 06:30 - BOS 12:20 4h 50m 1 Stop (PHL) Philadelphia
  • STLSt Louis Lambert Intl Airport 06:30
    PHLPhiladelphia International Airport 10:59
  • PHLPhiladelphia International Airport 09:39
    BOSBoston Logan International Airport 12:20
  • 4h 50m (1h 20m)
  • 1 Stop PHL · Philadelphia 1h 20m
  • American Airlines (AA 5167)Crj 700 Canadair Regional
    American Airlines (AA 1416)Airbus
  • American Airlines (AA 5167)
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  • 07:20 STL
    13:57 BOS
    5Hrs, 37m 1 Stop (CLT)
  • STLSt Louis Lambert Intl Airport 07:20 - BOS 13:57 5h 37m 1 Stop (CLT) Charlotte
  • STLSt Louis Lambert Intl Airport 07:20
    CLTCharlotte Airport 11:30
  • CLTCharlotte Airport 10:20
    BOSBoston Logan International Airport 13:57
  • 5h 37m (1h 10m)
  • 1 Stop CLT · Charlotte 1h 10m
  • American Airlines (AA 712)Boeing 737 800
    American Airlines (AA 3215)Airbus
  • American Airlines (AA 712)
    • -
    • -
    • -
    • -
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    • S
    • -
  • 07:50 STL
    13:10 BOS
    4Hrs, 20m 1 Stop (BNA)
  • STLSt Louis Lambert Intl Airport 07:50 - BOS 13:10 4h 20m 1 Stop (BNA) Nashville
  • STLSt Louis Lambert Intl Airport 07:50
    BNANashville Airport 09:45
  • BNANashville Airport 09:00
    BOSBoston Logan International Airport 13:10
  • 4h 20m (45m)
  • 1 Stop BNA · Nashville 45m
  • Southwest Airlines (WN 1766)Boeing 737 Max 8 Passenger
    Southwest Airlines (WN 1828)Boeing 737 Max 8 Passenger
  • Southwest Airlines (WN 1766)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
  • 08:25 STL
    14:26 BOS
    5Hrs, 01m 1 Stop (IAD)
  • STLSt Louis Lambert Intl Airport 08:25 - BOS 14:26 5h 01m 1 Stop (IAD) Washington
  • STLSt Louis Lambert Intl Airport 08:25
    IADWashington Dulles International Airport 12:50
  • IADWashington Dulles International Airport 11:43
    BOSBoston Logan International Airport 14:26
  • 5h 01m (1h 07m)
  • 1 Stop IAD · Washington 1h 07m
  • United Airlines (UA 4506)Canadair Regional Jet 550
    United Airlines (UA 2060)Airbus
  • United Airlines (UA 4506)
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  • 09:15 STL
    15:05 BOS
    4Hrs, 50m 1 Stop (BWI)
  • STLSt Louis Lambert Intl Airport 09:15 - BOS 15:05 4h 50m 1 Stop (BWI) Baltimore
  • STLSt Louis Lambert Intl Airport 09:15
    BWIBaltimore Washington International Airport 13:40
  • BWIBaltimore Washington International Airport 12:15
    BOSBoston Logan International Airport 15:05
  • 4h 50m (1h 25m)
  • 1 Stop BWI · Baltimore 1h 25m
  • Southwest Airlines (WN 4604)Boeing 737 700
    Southwest Airlines (WN 2844)Boeing 737 800
  • Southwest Airlines (WN 4604)
    • -
    • -
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    • -
    • -
    • S
    • -
  • 09:30 STL
    17:02 BOS
    6Hrs, 32m 1 Stop (CLT)
  • STLSt Louis Lambert Intl Airport 09:30 - BOS 17:02 6h 32m 1 Stop (CLT) Charlotte
  • STLSt Louis Lambert Intl Airport 09:30
    CLTCharlotte Airport 14:54
  • CLTCharlotte Airport 12:16
    BOSBoston Logan International Airport 17:02
  • 6h 32m (2h 38m)
  • 1 Stop CLT · Charlotte 2h 38m
  • American Airlines (AA 2493)Airbus
    American Airlines (AA 1886)Airbus
  • American Airlines (AA 2493)
    • M
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  • 12:25 STL
    17:40 BOS
    4Hrs, 15m 1 Stop (BWI)
  • STLSt Louis Lambert Intl Airport 12:25 - BOS 17:40 4h 15m 1 Stop (BWI) Baltimore
  • STLSt Louis Lambert Intl Airport 12:25
    BWIBaltimore Washington International Airport 16:10
  • BWIBaltimore Washington International Airport 15:20
    BOSBoston Logan International Airport 17:40
  • 4h 15m (50m)
  • 1 Stop BWI · Baltimore 50m
  • Southwest Airlines (WN 3342)Boeing 737 700
    Southwest Airlines (WN 615)Boeing 737 700
  • Southwest Airlines (WN 3342)
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  • 12:25 STL
    19:15 BOS
    5Hrs, 50m 1 Stop (BWI)
  • STLSt Louis Lambert Intl Airport 12:25 - BOS 19:15 5h 50m 1 Stop (BWI) Baltimore
  • STLSt Louis Lambert Intl Airport 12:25
    BWIBaltimore Washington International Airport 17:45
  • BWIBaltimore Washington International Airport 15:20
    BOSBoston Logan International Airport 19:15
  • 5h 50m (2h 25m)
  • 1 Stop BWI · Baltimore 2h 25m
  • Southwest Airlines (WN 3342)Boeing 737 700
    Southwest Airlines (WN 3773)Boeing 737 700
  • Southwest Airlines (WN 3342)
    • -
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  • 13:05 STL
    18:46 BOS
    4Hrs, 41m 1 Stop (IAD)
  • STLSt Louis Lambert Intl Airport 13:05 - BOS 18:46 4h 41m 1 Stop (IAD) Washington
  • STLSt Louis Lambert Intl Airport 13:05
    IADWashington Dulles International Airport 17:10
  • IADWashington Dulles International Airport 16:13
    BOSBoston Logan International Airport 18:46
  • 4h 41m (57m)
  • 1 Stop IAD · Washington 57m
  • United Airlines (UA 4454)Canadair Regional Jet 550
    United Airlines (UA 688)Airbus
  • United Airlines (UA 4454)
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    • F
    • -
    • -
  • 13:05 STL
    18:50 BOS
    4Hrs, 45m 1 Stop (IAD)
  • STLSt Louis Lambert Intl Airport 13:05 - BOS 18:50 4h 45m 1 Stop (IAD) Washington
  • STLSt Louis Lambert Intl Airport 13:05
    IADWashington Dulles International Airport 17:10
  • IADWashington Dulles International Airport 16:13
    BOSBoston Logan International Airport 18:50
  • 4h 45m (57m)
  • 1 Stop IAD · Washington 57m
  • United Airlines (UA 4454)Canadair Regional Jet 550
    United Airlines (UA 3468)Embraer 175
  • United Airlines (UA 4454)
    • -
    • -
    • -
    • -
    • -
    • S
    • S
  • 13:20 STL
    19:10 BOS
    4Hrs, 50m 1 Stop (MDW)
  • STLSt Louis Lambert Intl Airport 13:20 - BOS 19:10 4h 50m 1 Stop (MDW) Chicago
  • STLSt Louis Lambert Intl Airport 13:20
    MDWChicago Midway Airport 15:55
  • MDWChicago Midway Airport 14:25
    BOSBoston Logan International Airport 19:10
  • 4h 50m (1h 30m)
  • 1 Stop MDW · Chicago 1h 30m
  • Southwest Airlines (WN 2906)Boeing 737 Max 8 Passenger
    Southwest Airlines (WN 1933)Boeing 737 Max 8 Passenger
  • Southwest Airlines (WN 2906)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
  • 13:35 STL
    21:35 BOS
    7Hrs, 00m 1 Stop (MDW)
  • STLSt Louis Lambert Intl Airport 13:35 - BOS 21:35 7h 1 Stop (MDW) Chicago
  • STLSt Louis Lambert Intl Airport 13:35
    MDWChicago Midway Airport 18:25
  • MDWChicago Midway Airport 14:40
    BOSBoston Logan International Airport 21:35
  • 7h (3h 45m)
  • 1 Stop MDW · Chicago 3h 45m
  • Southwest Airlines (WN 2906)Boeing 737 800
    Southwest Airlines (WN 1933)Boeing 737 Max 8 Passenger
  • Southwest Airlines (WN 2906)
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    • -
    • -
    • -
    • -
  • 13:40 STL
    19:40 BOS
    5Hrs, 00m 1 Stop (BNA)
  • STLSt Louis Lambert Intl Airport 13:40 - BOS 19:40 5h 1 Stop (BNA) Nashville
  • STLSt Louis Lambert Intl Airport 13:40
    BNANashville Airport 16:15
  • BNANashville Airport 14:50
    BOSBoston Logan International Airport 19:40
  • 5h (1h 25m)
  • 1 Stop BNA · Nashville 1h 25m
  • Southwest Airlines (WN 2004)Boeing 737 800
    Southwest Airlines (WN 3239)Boeing 737 700
  • Southwest Airlines (WN 2004)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
  • 13:45 STL
    21:36 BOS
    6Hrs, 51m 1 Stop (DFW)
  • STLSt Louis Lambert Intl Airport 13:45 - BOS 21:36 6h 51m 1 Stop (DFW) Dallas
  • STLSt Louis Lambert Intl Airport 13:45
    DFWDallas/Fort Worth Intl Airport 17:06
  • DFWDallas/Fort Worth Intl Airport 15:45
    BOSBoston Logan International Airport 21:36
  • 6h 51m (1h 21m)
  • 1 Stop DFW · Dallas 1h 21m
  • American Airlines (AA 1325)Airbus
    American Airlines (AA 595)Airbus A321 Neo
  • American Airlines (AA 1325)
    • -
    • -
    • -
    • -
    • -
    • -
    • S
  • 16:05 STL
    21:35 BOS
    4Hrs, 30m 1 Stop (MDW)
  • STLSt Louis Lambert Intl Airport 16:05 - BOS 21:35 4h 30m 1 Stop (MDW) Chicago
  • STLSt Louis Lambert Intl Airport 16:05
    MDWChicago Midway Airport 18:25
  • MDWChicago Midway Airport 17:15
    BOSBoston Logan International Airport 21:35
  • 4h 30m (1h 10m)
  • 1 Stop MDW · Chicago 1h 10m
  • Southwest Airlines (WN 2973)Boeing 737 Max 8 Passenger
    Southwest Airlines (WN 1933)Boeing 737 Max 8 Passenger
  • Southwest Airlines (WN 2973)
    • -
    • T
    • W
    • -
    • -
    • -
    • -
  • 16:45 STL
    22:10 BOS
    4Hrs, 25m 1 Stop (BNA)
  • STLSt Louis Lambert Intl Airport 16:45 - BOS 22:10 4h 25m 1 Stop (BNA) Nashville
  • STLSt Louis Lambert Intl Airport 16:45
    BNANashville Airport 18:45
  • BNANashville Airport 17:55
    BOSBoston Logan International Airport 22:10
  • 4h 25m (50m)
  • 1 Stop BNA · Nashville 50m
  • Southwest Airlines (WN 2215)Boeing 737 700
    Southwest Airlines (WN 2456)Boeing 737 800
  • Southwest Airlines (WN 2215)
    • -
    • T
    • W
    • -
    • -
    • -
    • -
  • 17:15 STL
    00:05 BOS
    5Hrs, 50m 1 Stop (BWI)
  • STLSt Louis Lambert Intl Airport 17:15 - BOS 00:05 5h 50m 1 Stop (BWI) Baltimore
  • STLSt Louis Lambert Intl Airport 17:15
    BWIBaltimore Washington International Airport 22:40
  • BWIBaltimore Washington International Airport 20:10
    BOSBoston Logan International Airport 00:05
  • 5h 50m (2h 30m)
  • 1 Stop BWI · Baltimore 2h 30m
  • Southwest Airlines (WN 3961)Boeing 737 Max 8 Passenger
    Southwest Airlines (WN 4784)Boeing 737 Max 8 Passenger
  • Southwest Airlines (WN 3961)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
  • 17:27 STL
    00:54 BOS
    6Hrs, 27m 1 Stop (ORD)
  • STLSt Louis Lambert Intl Airport 17:27 - BOS 00:54 6h 27m 1 Stop (ORD) Chicago
  • STLSt Louis Lambert Intl Airport 17:27
    ORDChicago O'Hare International Airport 21:30
  • ORDChicago O'Hare International Airport 18:49
    BOSBoston Logan International Airport 00:54
  • 6h 27m (2h 41m)
  • 1 Stop ORD · Chicago 2h 41m
  • United Airlines (UA 602)Boeing 737 800
    United Airlines (UA 2627)Boeing 737 900
  • United Airlines (UA 602)
    • -
    • -
    • -
    • -
    • -
    • S
    • -
No Schedules Sorry, there are no schedules matching your filters. Try removing one. reset
What’s the fastest flight time from Saint Louis to Boston?

The fastest flight time for direct flights from Saint Louis to Boston is 2 hours 30 minutes. Check latest flight schedules & prices on Wego.

How far is Boston from Saint Louis?

The flight distance between Saint Louis and Boston is 1667km. Check all available flights on Wego.

When is the earliest and latest flight of the day?

The earliest flight of the day departs at 05:35. The last flight of the day departs at 18:15. See the full list of flight times on Wego.

How many airlines offer direct flights from Saint Louis to Boston?

There are 1 airlines that offer direct flights from Saint Louis to Boston. Find out the list of airlines on Wego.