£205 Cheap Flights from Boston (BOS) to St. Louis (STL)

View £205 flight on Wed, 27 May 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 £205 for one-way flights and £249 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 2 Jun - Tue, 16 Jun
BOS
Boston
STL
St. Louis
£249 Return, found 2 days ago
£249
Return
found 2 days ago
Select Delta flight, departing Tue, 2 Jun from Boston to St. Louis, returning Tue, 16 Jun, priced at £249 found 2 days ago
Delta
Sat, 30 May - Tue, 16 Jun
BOS
Boston
STL
St. Louis
£263 Return, found 2 days ago
£263
Return
found 2 days ago
Select Delta flight, departing Sat, 30 May from Boston to St. Louis, returning Tue, 16 Jun, priced at £263 found 2 days ago
Delta
Tue, 16 Jun - Wed, 1 Jul
BOS
Boston
STL
St. Louis
£273 Return, found 2 days ago
£273
Return
found 2 days ago
Select Delta flight, departing Tue, 16 Jun from Boston to St. Louis, returning Wed, 1 Jul, priced at £273 found 2 days ago
Delta
Mon, 25 May - Sat, 6 Jun
BOS
Boston
STL
St. Louis
£276 Return, found 2 days ago
£276
Return
found 2 days ago
Select Delta flight, departing Mon, 25 May from Boston to St. Louis, returning Sat, 6 Jun, priced at £276 found 2 days ago
Delta
Tue, 19 May - Thu, 4 Jun
BOS
Boston
STL
St. Louis
£281 Return, found 2 days ago
£281
Return
found 2 days ago
Select Delta flight, departing Tue, 19 May from Boston to St. Louis, returning Thu, 4 Jun, priced at £281 found 2 days ago
Delta
Tue, 30 Jun - Tue, 14 Jul
BOS
Boston
STL
St. Louis
£285 Return, found 2 days ago
£285
Return
found 2 days ago
Select Delta flight, departing Tue, 30 Jun from Boston to St. Louis, returning Tue, 14 Jul, priced at £285 found 2 days ago
Delta
Thu, 21 May - Thu, 4 Jun
BOS
Boston
STL
St. Louis
£294 Return, found 2 days ago
£294
Return
found 2 days ago
Select Delta flight, departing Thu, 21 May from Boston to St. Louis, returning Thu, 4 Jun, priced at £294 found 2 days ago
Delta
Sat, 30 May - Sat, 13 Jun
BOS
Boston
STL
St. Louis
£298 Return, found 2 days ago
£298
Return
found 2 days ago
Select Delta flight, departing Sat, 30 May from Boston to St. Louis, returning Sat, 13 Jun, priced at £298 found 2 days ago
American Airlines
Mon, 18 May - Tue, 2 Jun
BOS
Boston
STL
St. Louis
£323 Return, found 2 days ago
£323
Return
found 2 days ago
Select American Airlines flight, departing Mon, 18 May from Boston to St. Louis, returning Tue, 2 Jun, priced at £323 found 2 days ago
Alaska Airlines
Thu, 4 Jun - Mon, 8 Jun
BOS
Boston
STL
St. Louis
£455 Return, found 6 days ago
£455
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 4 Jun from Boston to St. Louis, returning Mon, 8 Jun, priced at £455 found 6 days 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 £299
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city centre20 min
Flights from £299

Frequently asked questions

What is the cheapest month to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
September is typically the cheapest month to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), with average return fares of approximately £548. This is about 11% lower than the average price throughout the year. September often sees lower prices as the summer travel season winds down and before the holiday rush begins. Other cheap months to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) include February and August.
Which airlines fly direct from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Enter BOS to STL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), 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 airline to fly with from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will differ from traveller to traveller. If you like to fly early, WN offers early morning flights. If price is the most important factor, WN typically offers the lowest fares. AA offers the most daily flights from BOS to STL, which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
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, as it's one of the cheapest months to fly and also a popular time, meaning you'll find plenty of flight options. Based on booking data from the past year, you can expect average return flight prices around £548 in August. If you're looking for the absolute cheapest fares, September is also a good option.
How many flights per day from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
There are approximately 5 nonstop flights per day from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.). For even more choice, look at flights that include layovers, as there are around 139 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Seattle - Tacoma Intl. (SEA), and LaGuardia (LGA).
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 at approximately 5:00 AM local time, operated by AA / 9X. This is a seasonal service active in October. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll find the most flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) on a Friday, with around 86 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, Delta Air Lines, and United Airlines. Friday sees notably more flight options compared to other days of the week.
What are the most popular departure times for flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) are in the early morning, from 6am to 9am. Approximately 24% of passengers prefer this time window. Many major carriers, including American Airlines and Delta, offer flights during this window. These times work well because you can get an early start to your travel day and arrive in St. Louis with plenty of time for your activities.
How long does it take to fly from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A nonstop flight from BOS to STL typically takes around 3 hours 20 minutes, covering approximately 1,044 miles. Connecting flights on this route usually add 2 hours 30 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Select the "Business class" and "First class" filters when looking for BOS to 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 from Logan Intl. (BOS)?
If you're planning to travel to St. Louis from Logan Intl. (BOS), you can fly directly into Lambert-St. Louis Intl. (STL) Some flights may connect through major hubs like Portland Intl. (PDX), Baltimore Washington Intl. Thurgood Marshall (BWI), Nashville Intl. (BNA) 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-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Boston, MA (BOS-Logan Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) 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
£249
Distance
1669 km
Average flight time
2 hours 6 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 £249 and range up to £455.  

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 June, 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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