£183 Cheap Flights from St. Louis (STL) to Boston (BOS)

View £183 flight on Sat, 4 Jul 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £183 for one-way flights and £481 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, 14 Oct - Wed, 21 Oct
STL
St. Louis
BOS
Boston
£481 Return, found 6 days ago
£481
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 14 Oct from St. Louis to Boston, returning Wed, 21 Oct, priced at £481 found 6 days ago
Alaska Airlines
Wed, 5 Aug - Fri, 7 Aug
STL
St. Louis
BOS
Boston
£577 Return, found 2 days ago
£577
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 5 Aug from St. Louis to Boston, returning Fri, 7 Aug, priced at £577 found 2 days ago
Alaska Airlines
Wed, 5 Aug - Fri, 7 Aug
STL
St. Louis
BOS
Boston
£658 Return, found 2 days ago
£658
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 5 Aug from St. Louis to Boston, returning Fri, 7 Aug, priced at £658 found 2 days ago
Alaska Airlines
Wed, 5 Aug - Fri, 7 Aug
STL
St. Louis
BOS
Boston
£687 Return, found 2 days ago
£687
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 5 Aug from St. Louis to Boston, returning Fri, 7 Aug, priced at £687 found 2 days ago
Alaska Airlines
Wed, 6 May - Sat, 9 May
STL
St. Louis
BOS
Boston
£713 Return, found 2 days ago
£713
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 6 May from St. Louis to Boston, returning Sat, 9 May, priced at £713 found 2 days ago
Alaska Airlines
Wed, 5 Aug - Fri, 7 Aug
STL
St. Louis
BOS
Boston
£732 Return, found 2 days ago
£732
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 5 Aug from St. Louis to Boston, returning Fri, 7 Aug, priced at £732 found 2 days ago
Alaska Airlines
Wed, 6 May - Thu, 7 May
STL
St. Louis
BOS
Boston
£749 Return, found 2 days ago
£749
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 6 May from St. Louis to Boston, returning Thu, 7 May, priced at £749 found 2 days ago
Alaska Airlines
Wed, 5 Aug - Fri, 7 Aug
STL
St. Louis
BOS
Boston
£764 Return, found 2 days ago
£764
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 5 Aug from St. Louis to Boston, returning Fri, 7 Aug, priced at £764 found 2 days ago
Alaska Airlines
Wed, 5 Aug - Fri, 7 Aug
STL
St. Louis
BOS
Boston
£765 Return, found 2 days ago
£765
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 5 Aug from St. Louis to Boston, returning Fri, 7 Aug, priced at £765 found 2 days ago
Alaska Airlines
Wed, 5 Aug - Fri, 7 Aug
STL
St. Louis
BOS
Boston
£768 Return, found 2 days ago
£768
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 5 Aug from St. Louis to Boston, returning Fri, 7 Aug, priced at £768 found 2 days ago

Frequently asked questions

How much is a flight from STL to BOS?
Round-trip flights from Lambert-St. Louis Intl. Airport (STL) to BOS start from £481. This is based on fares listed within the last 7 days on Expedia for flights departing within the next year — book today so you don't miss out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from St. Louis Lambert International Airport to BOS?
Each airline has its own terms and conditions. If you decide to cancel your holiday, head to our Customer Service Portal.
How do I find cheap flights from Lambert-St. Louis Intl. Airport (STL) to BOS that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Lambert-St. Louis Intl. Airport (STL) to BOS flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Lambert-St. Louis Intl. Airport (STL) to BOS?
It's around 1,700 kilometres between STL and BOS, so expect to be strapped into your seat for a while. Keep yourself occupied by packing things like crossword puzzles or a gripping book.
Which airlines fly direct from Lambert Field to BOS?
With 78 flights every month operating from Lambert-St. Louis Intl. Airport (STL) to Logan Intl. Airport, Southwest Airlines (WN) is a popular choice. Another carrier servicing this route is American Airlines (AA). You'll have 56 flights every month to select from.
Are St. Louis Lambert International Airport to Logan Intl. Airport (BOS) flight tickets cheaper when they're purchased at the last minute?
Flight prices fluctuate, so it's no sure thing. While last-minute deals between St. Louis Lambert International Airport and Logan Intl. Airport are possible, it also makes sense to keep a close eye on prices well before you fly. In fact, some air carriers publicize their prices up to a year prior to the departure date. Expedia is constantly updating the biggest airfare bargains around, so keep checking and be ready to book when fare prices drop.

Frequently asked questions

Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
Enter STL to BOS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
The best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.), 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
When flying from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.), you'll find around 6 nonstop flights per day. For even more choice, look at flights that include layovers, as there are approximately 84 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and Seattle - Tacoma Intl. (SEA).
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
The earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.) typically departs at approximately 5:00 AM local time. This service is operated by American Airlines and is a seasonal service active in December. An early departure like this can help 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
You'll typically find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) (STL) to Boston, MA (BOS-Logan Intl.) (BOS) on a Friday, with around 62 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, Southwest Airlines, and United Airlines. Flight options are fairly consistent throughout the week, with Fridays offering only slightly more flights than other weekdays.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
The most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.) are in the early morning, from 6am to 9am. Approximately 31% of passengers prefer this time window. Many major carriers, including AA, DL and UA, offer flights during this window. These times work well because you can get an early start to your travel day and arrive in Boston with plenty of time to spare.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
Flying nonstop from STL to BOS takes around 2 hours 30 minutes, with the route covering approximately 1,044 miles. Flights with a layover typically take 2 hours 30 minutes longer than direct options. 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
Select the "Business class" and "First class" filters when looking for STL to BOS 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan 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 Boston from Lambert-St. Louis Intl. (STL)?
If you're planning to travel to Boston from Lambert-St. Louis Intl. (STL), you can fly directly into Logan Intl. (BOS) Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Hartsfield-Jackson Atlanta Intl. (ATL), O'Hare Intl. (ORD) before reaching Boston. 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan 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 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan Intl.)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Boston, MA (BOS-Logan 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
Lambert-St. Louis Intl.
Destination airport
Logan Intl.
Return price
£481
Distance
1669 km
Average flight time
3 hours 37 mins

Book with confidence

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

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

The easiest way to view the best deals on flights from St. Louis to Boston 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 Lambert-St. Louis Intl. to Logan Intl. start at just £481 and range up to £768.  

To find an even better deal, try  

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

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

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Lambert-St. Louis Intl. to Logan 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 St. Louis to Boston easily and book with confidence

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