CA $148 Cheap Flights from St. Louis (STL) to Boston (BOS)

View CA $148 flight on Mon, Aug. 18, 2025Opens in a new window

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

Prices were available within the past 7 days and start at CA $148 for one-way flights and CA $405 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $405 Roundtrip, found 15 hours ago
CA $405
Roundtrip
found 15 hours ago
Select Delta flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $405 found 15 hours ago
American Airlines
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $475 Roundtrip, found 15 hours ago
CA $475
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $475 found 15 hours ago
American Airlines
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $488 Roundtrip, found 15 hours ago
CA $488
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $488 found 15 hours ago
American Airlines
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $502 Roundtrip, found 15 hours ago
CA $502
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $502 found 15 hours ago
Delta
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $505 Roundtrip, found 15 hours ago
CA $505
Roundtrip
found 15 hours ago
Select Delta flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $505 found 15 hours ago
American Airlines
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $542 Roundtrip, found 15 hours ago
CA $542
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $542 found 15 hours ago
American Airlines
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $546 Roundtrip, found 15 hours ago
CA $546
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $546 found 15 hours ago
American Airlines
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $555 Roundtrip, found 15 hours ago
CA $555
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $555 found 15 hours ago
American Airlines
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $558 Roundtrip, found 15 hours ago
CA $558
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $558 found 15 hours ago
Alaska Airlines
Thu., Jul. 24 - Tue., Jul. 29
STL
St. Louis
BOS
Boston
CA $736 Roundtrip, found 15 hours ago
CA $736
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Thu., Jul. 24 from St. Louis to Boston, returning Tue., Jul. 29, priced at CA $736 found 15 hours ago
Flight from St. Louis to Boston (STL - BOS) route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Logan Intl.
Airlines serving
American Airlines, Delta
Roundtrip price
CA $404
Distance
1669 km

St. Louis to Boston Flights

The easy way to book your flights from St. Louis to Boston 

With Expedia, it’s simple to find and book flights to Boston from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are American Airlines, Qatar Airways, Southwest Airlines, Iberia nonstop flights to Logan Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Boston today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Logan Intl., BOS 

Sort your search results by price to find great deals on your flight from St. Louis to Boston—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Boston from St. Louis currently is just CA $405 rising to CA $736.  

Here are more money-saving tips: 

  • Fly in July when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Boston  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Boston from St. Louis 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Boston with Expedia today.

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 CA $405. 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 vacation, 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 kilometers 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.

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