Cheap flights from Boston to St. Louis

Logan
BOS
Lambert-St. Louis
STL

Flight deals from Boston to St. Louis

Below you can see the best deals on flights Boston — St. Louis for upcoming dates. Direct and connecting flights from various airlines — compare prices and choose the right ticket.

The lowest price for the next 2 months is on 19 September, from $121.

Top 10 cheap flights from Boston to St. Louis

About the Boston — St. Louis flight

Looking for cheap flights from Boston to St. Louis? Compare fares from different airlines, check the flight schedule and travel time — and book your Boston — St. Louis ticket online at the best price.

The route has direct flights — around 36 flights per week, flights are operated by American Airlines, Southwest Airlines, British Airways, Iberia, a nonstop flight takes about 3 h 9 min, the distance between the cities is around 1,671 km.

Planning your trip? You may find our St. Louis travel guide, how to get from the airport into town and St. Louis weather forecast useful. To catch a low fare, use the low-price calendar and the monthly price chart on this page.

Facts about this route

from $121Min. price
SeptemberCheapest
MarchPeak season
YesDirect flights
1,671 kmDistance
3 h 9 minTravel time
4Airlines
36 / wkFlights

Flight schedule from Boston to St. Louis

The table shows direct flights from Boston to St. Louis on the selected date. The flight takes approximately 3 h 9 min. Regular flights are operated by American Airlines, Southwest Airlines, British Airways and Iberia. Departures from Logan International Airport airports, arrivals at Lambert-St. Louis International Airport.

For each flight, the following details are shown: departure time (local), arrival city and airport, flight number and airline, terminal or gate, and status. Click on a flight to open its details and go to ticket search. To view flights on a different day, change the date above the table.

Today
Any time
Last update: 25 Aug 2026

Flight ticket prices by day: Boston — St. Louis

Below is a calendar of the lowest flight ticket prices for Boston — St. Louis by day. Pick a convenient date and instantly see the fare. The cheapest flights on this route start from $121 in September, and the most expensive are around $284 in March. If your travel dates are flexible, the calendar will help you find the best price for your preferred period. To view round-trip fares, switch to the "Round trip" tab above the calendar, select your departure date — and the right-hand calendar will highlight the lowest prices for return flights on each day.

 
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Prices by month

Average one-way fares from Boston to St. Louis by month. Tickets are usually cheapest in September (around $234) and priciest in July (about $324) — use the table and chart below to pick the best time to fly.

MonthAverage priceLevelMonthAverage priceLevelMonthAverage priceLevel
Jan$240lowMay$276mediumSep$234low
Feb$238lowJun$306highOct$242low
Mar$318highJul$324highNov$274medium
Apr$270mediumAug$246lowDec$312high

Some values are estimated based on seasonality.

When to fly

Weather in St. Louis: it is warmest in July (up to 31 °C on average) and coolest in January (around 5 °C). The driest month is September.

Tickets are usually cheapest in September and most expensive in March. Compare prices and weather by month in the charts below to pick the best time to fly.

Temperature · St. Louis

Dry and wet days · St. Louis

Wind speed and direction · St. Louis

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How to get the best deal on a Boston — St. Louis ticket

  • Book ahead: fares for Boston — St. Louis are usually lower 3–8 weeks before departure than at the last minute.
  • Play with your dates — Tuesday, Wednesday and Saturday departures are often cheaper than Friday and Sunday.
  • The cheapest month to fly to St. Louis is usually September — plan your trip around it if your dates are flexible.
  • Compare direct and connecting flights: nonstop is faster, while a connection is sometimes noticeably cheaper.
  • Watch the low-price calendar and the monthly price trend on this page — they make it easier to catch a good date.
  • Travelling light? Pick a cabin-baggage-only fare — tickets without checked luggage are noticeably cheaper.
  • Get to the airport in good time — about 2–3 hours before an international departure and roughly an hour before a domestic one.

Airlines

Flights on the Boston — St. Louis route are operated by 4 airlines; American Airlines runs the most flights (around 50% of all flights). Compare carriers, flight shares and schedules below.

  • American AirlinesAA
    6x/week
    WebsiteFleet: 965211M pax/year
    • Direct flight BOS → STL6x/week
      Duration
      3h 9m
      Days
      MTWTFSS
    50.0%Open →
  • Southwest AirlinesWN
    4x/week
    WebsiteFleet: 817140M pax/year
    • Direct flight BOS → STL4x/week
      Duration
      2h 54m
      Days
      MTWTFSS
    33.3%Open →
  • British AirwaysBA
    2x/week
    WebsiteFleet: 29243M pax/year
    • Direct flight BOS → STL2x/week
    13.9%Open →
  • IberiaIB
    1x/week
    WebsiteFleet: 9224M pax/year
    • Direct flight BOS → STL1x/week
      Duration
      1h
      Days
      MTWTFSS
    2.8%Open →

Cities and airports on the Boston — St. Louis route

Flights Boston — St. Louis depart from Logan International Airport and arrive at Lambert-St. Louis International Airport. Below are pages for the cities, countries, and airports on the route: airlines, schedules, and travel guides.

Departure

Boston

BOS
United States
About the cityHow to get thereWeatherAll about the country United States
Arrival

St. Louis

STL
United States
About the cityHow to get thereWeatherAll about the country United States
Departure airports
Arrival airports

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Frequently asked questions about the Boston — St. Louis flight

How long is the flight from Boston to St. Louis?

A nonstop Boston — St. Louis flight takes about 3 h 9 min — the distance between the cities is around 1,671 km.

How far is it from Boston to St. Louis?

The distance from Boston to St. Louis is about 1,671 km, which a nonstop flight covers in around 3 h 9 min.

Are there direct flights from Boston to St. Louis?

Yes, there are nonstop flights Boston — St. Louis — around 36 flights per week.

Which airlines fly from Boston to St. Louis?

Airlines operating Boston — St. Louis include American Airlines, Southwest Airlines, British Airways, Iberia. See the full list with schedules in the "Airlines" section on this page.

Which airports do Boston — St. Louis flights use?

Flights from Boston depart from Logan International Airport, and arrive at Lambert-St. Louis International Airport. If a city has more than one airport, check which one your ticket uses before you travel.

How much is a ticket from Boston to St. Louis?

The price of a Boston — St. Louis ticket depends on your travel date, season and demand: it is usually cheapest to fly in September, and most expensive in March. Tickets typically cost between $121 and $284. Check the current lowest fare and low-price calendar on this page.

When is the best time to book flights Boston — St. Louis?

Flights Boston — St. Louis are usually cheaper when booked in advance — a few weeks before departure and away from peak dates; the most budget-friendly month to fly is September. Compare prices by month in the price trend chart on this page.

How can I find the cheapest flights from Boston to St. Louis?

To catch a low fare Boston — St. Louis, book a few weeks in advance, keep your dates flexible, and compare airlines and connecting options. The low-price calendar and monthly price chart on this page show the cheapest days and months at a glance: the most budget-friendly month to fly is usually September.

How early should I arrive at the airport?

For international flights, plan to be at the airport about 2–3 hours before departure, and around an hour before a domestic flight. Allow extra time during busy travel seasons and at large hubs, where check-in and security lines can be longer.

Where else you can fly from Boston

See all
New York CityWashington, D.C.ChicagoTorontoSan FranciscoAtlantaSeattleLos AngelesPhiladelphiaNantucketLondonDallasOrlandoDenverFort LauderdaleDetroitCharlotteRaleighMontrealNashvilleMarthas VineyardMiamiMinneapolisSan DiegoBuffaloPhoenixMadridTampaPittsburghClevelandBarcelonaIndianapolisSan JuanDublinHoustonParisAustinLas VegasRichmondCincinnati

Where else you can fly from St. Louis

See all
ChicagoDallasNew York CityAtlantaSeattleMinneapolisTorontoDenverHoustonCharlotteWashington, D.C.DetroitPortlandOrlandoPhoenixPhiladelphiaSalt Lake CityMontrealMiamiLos AngelesLas VegasCancunFort LauderdaleJonesboroSan FranciscoLondonTampaFrankfurt am MainPunta CanaQuincyManhattan

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