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£225 Cheap Flights from Boston (BOS) to St. Louis (STL)

View £225 flight on Mon, 10 Aug 2026Opens in a new window

Popular airlines from Logan International Airport (BOS) to Lambert-St. Louis International Airport (STL)

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Cheap Flights from Boston (BOS) to St. Louis (STL)

Prices were available within the past 7 days and start at £225 for one-way flights and £245 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 19 Sept - Wed, 7 Oct
BOS
Boston
STL
St. Louis
£245 Return, found 5 days ago
£245
Return
found 5 days ago
Select Delta flight, departing Sat, 19 Sept from Boston to St. Louis, returning Wed, 7 Oct, priced at £245 found 5 days ago
Delta
Tue, 18 Aug - Mon, 24 Aug
BOS
Boston
STL
St. Louis
£252 Return, found 5 days ago
£252
Return
found 5 days ago
Select Delta flight, departing Tue, 18 Aug from Boston to St. Louis, returning Mon, 24 Aug, priced at £252 found 5 days ago
Delta
Sun, 6 Sept - Mon, 21 Sept
BOS
Boston
STL
St. Louis
£256 Return, found 5 days ago
£256
Return
found 5 days ago
Select Delta flight, departing Sun, 6 Sept from Boston to St. Louis, returning Mon, 21 Sept, priced at £256 found 5 days ago
Delta
Sat, 22 Aug - Sun, 6 Sept
BOS
Boston
STL
St. Louis
£263 Return, found 5 days ago
£263
Return
found 5 days ago
Select Delta flight, departing Sat, 22 Aug from Boston to St. Louis, returning Sun, 6 Sept, priced at £263 found 5 days ago
Delta
Fri, 18 Sept - Tue, 29 Sept
BOS
Boston
STL
St. Louis
£282 Return, found 5 days ago
£282
Return
found 5 days ago
Select Delta flight, departing Fri, 18 Sept from Boston to St. Louis, returning Tue, 29 Sept, priced at £282 found 5 days ago
American Airlines
Thu, 3 Sept - Tue, 15 Sept
BOS
Boston
STL
St. Louis
£290 Return, found 5 days ago
£290
Return
found 5 days ago
Select American Airlines flight, departing Thu, 3 Sept from Boston to St. Louis, returning Tue, 15 Sept, priced at £290 found 5 days ago
Delta
Sat, 15 Aug - Mon, 17 Aug
BOS
Boston
STL
St. Louis
£294 Return, found 5 days ago
£294
Return
found 5 days ago
Select Delta flight, departing Sat, 15 Aug from Boston to St. Louis, returning Mon, 17 Aug, priced at £294 found 5 days ago
American Airlines
Mon, 24 Aug - Mon, 7 Sept
BOS
Boston
STL
St. Louis
£298 Return, found 5 days ago
£298
Return
found 5 days ago
Select American Airlines flight, departing Mon, 24 Aug from Boston to St. Louis, returning Mon, 7 Sept, priced at £298 found 5 days ago
United
Mon, 7 Sept - Thu, 24 Sept
BOS
Boston
STL
St. Louis
£302 Return, found 5 days ago
£302
Return
found 5 days ago
Select United flight, departing Mon, 7 Sept from Boston to St. Louis, returning Thu, 24 Sept, priced at £302 found 5 days ago
Alaska Airlines
Wed, 26 Aug - Sat, 29 Aug
BOS
Boston
STL
St. Louis
£486 Return, found 1 day ago
£486
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 26 Aug from Boston to St. Louis, returning Sat, 29 Aug, priced at £486 found 1 day ago

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city centre is 20 minutes. Flights from £334
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city centre20 min
Flights from £334

Find the cheapest month to fly from Boston (BOS) to St. Louis (STL)

January is typically the cheapest month to fly

From £143 - £268 per traveller.

Frequently asked questions

How much does a flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from £225 and cheap return flights from £245 BOS to STL with Expedia. One-way flights typically cost between £185 and £473. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when BOS to STL ticket fares go up or down.
What is the cheapest month to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you're looking for the cheapest time to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), September is typically your best bet. You can expect average return flights to be around £295 during this month. September often sees lower prices because the summer travel rush has ended, and demand starts to decrease. Other budget-friendly months for this route include February and August.
Which airlines fly direct from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
There are 2 airlines offering direct flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.). Here are the carriers:
  • Southwest Airlines operates 21 direct flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) every week.
  • American Airlines operates 17 direct flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) every week.
How do I find cheap flights from Boston, MA (BOS) to St. Louis, MO (STL)?
To find a cheap flight from Boston, MA (BOS) to St. Louis, MO (STL), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) is typically August. This month offers a great balance—prices are reasonable at around £295 for a return flight, and you'll have plenty of flight options since it's a popular time to travel. If you're flexible, August gives you both affordable fares and excellent flight schedules to work with.
What is the earliest flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically departs around 5:00 AM. This service is offered by American Airlines and Southern Airways. This is a seasonal service, active in June, July, August, and September. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A direct flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically takes around 3 hours 18 minutes, covering a distance of approximately 1,680 kilometers. If you opt for a flight with one stop, your journey will usually be longer, taking about 5 hours 48 minutes. Flights with two or more stops will extend your travel time further, to around 8 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.
Can you fly business or first class from Boston, MA (BOS) to St. Louis, MO (STL)?
Select the "Business class" and "First class" filters when looking for Boston, MA (BOS) to St. Louis, MO (STL) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis, MO (STL) from Boston, MA (BOS)?
If you're planning to travel to St. Louis from Logan International Airport (BOS), you can fly directly into Lambert-St. Louis International Airport (STL). Some flights may connect through major hubs like Portland International Airport (PDX), Baltimore Washington International Thurgood Marshall Airport (BWI), or Seattle - Tacoma International Airport (SEA) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Boston, MA (BOS) to St. Louis, MO (STL)?
If you booked your Boston, MA (BOS) to St. Louis, MO (STL) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Logan Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines
Return price
£244
Distance
1669 km
Average flight time
1 hour 57 mins

Book with confidence

Compare flights from Boston to St. Louis easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Boston to St. Louis. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Lambert-St. Louis Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Logan Intl. to Lambert-St. Louis Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Logan Intl. (BOS) to Lambert-St. Louis Intl. (STL)

The easiest way to view the best deals on flights from Boston to St. Louis today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Logan Intl. to Lambert-St. Louis Intl. start at just £245 and range up to £486.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Boston and St. Louis
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Boston to St. Louis flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Logan Intl. to Lambert-St. Louis Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Boston to St. Louis easily and book with confidence

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*Available to Expedia members.