€121 Cheap Flights St. Louis to Boston (STL-BOS)

View €121 flight on Sat, 2 May 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at €121 for one-way flights and €353 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€353 Return, found 2 days ago
€353
Return
found 2 days ago
Select American Airlines flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €353 found 2 days ago
American Airlines
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€413 Return, found 2 days ago
€413
Return
found 2 days ago
Select American Airlines flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €413 found 2 days ago
American Airlines
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€467 Return, found 2 days ago
€467
Return
found 2 days ago
Select American Airlines flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €467 found 2 days ago
American Airlines
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€475 Return, found 2 days ago
€475
Return
found 2 days ago
Select American Airlines flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €475 found 2 days ago
American Airlines
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€483 Return, found 2 days ago
€483
Return
found 2 days ago
Select American Airlines flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €483 found 2 days ago
United
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€490 Return, found 2 days ago
€490
Return
found 2 days ago
Select United flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €490 found 2 days ago
American Airlines
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€498 Return, found 2 days ago
€498
Return
found 2 days ago
Select American Airlines flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €498 found 2 days ago
American Airlines
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€506 Return, found 2 days ago
€506
Return
found 2 days ago
Select American Airlines flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €506 found 2 days ago
Delta
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€515 Return, found 2 days ago
€515
Return
found 2 days ago
Select Delta flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €515 found 2 days ago
United
Sat, 2 May - Mon, 4 May
STL
St. Louis
BOS
Boston
€527 Return, found 2 days ago
€527
Return
found 2 days ago
Select United flight, departing Sat, 2 May from St. Louis to Boston, returning Mon, 4 May, priced at €527 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 €353. 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.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Logan Intl.
Return price
€353
Distance
1669 km
Average flight time
3 hours 37 mins

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