Cheap Flights from St Louis to Boston Logan International

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Compare St Louis to Boston Logan International flight deals

Find the cheapest month or even day of the year to fly to Boston Logan International

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Flight deals from St Louis to Boston Logan International

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Boston Logan International Airport? If you want to travel next month, return fares start from $537. Find the lowest prices on one-way and return tickets right here.

Boston.$419 per passenger.Departing Thu, 10 Dec, returning Mon, 14 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Thu, 10 Dec, arriving in Boston Logan International.Inbound indirect flight with Frontier Airlines, departs from Boston Logan International on Mon, 14 Dec, arriving in St Louis.Price includes taxes and charges.From $419, select.

Boston.$455 per passenger.Departing Fri, 23 Oct, returning Mon, 26 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 23 Oct, arriving in Boston Logan International.Inbound indirect flight with Frontier Airlines, departs from Boston Logan International on Mon, 26 Oct, arriving in St Louis.Price includes taxes and charges.From $455, select.

Boston.$535 per passenger.Departing Wed, 25 Nov, returning Tue, 1 Dec.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Wed, 25 Nov, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Tue, 1 Dec, arriving in St Louis.Price includes taxes and charges.From $535, select.

Boston.$537 per passenger.Departing Wed, 4 Nov, returning Sat, 7 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Wed, 4 Nov, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Sat, 7 Nov, arriving in St Louis.Price includes taxes and charges.From $537, select.

Boston.$551 per passenger.Departing Mon, 14 Dec, returning Sat, 23 Jan.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Mon, 14 Dec, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Sat, 23 Jan, arriving in St Louis.Price includes taxes and charges.From $551, select.

Boston.$556 per passenger.Departing Sat, 5 Dec, returning Sat, 12 Dec.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Sat, 5 Dec, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Sat, 12 Dec, arriving in St Louis.Price includes taxes and charges.From $556, select.

Boston.$558 per passenger.Departing Sat, 24 Oct, returning Sat, 31 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Sat, 24 Oct, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Sat, 31 Oct, arriving in St Louis.Price includes taxes and charges.From $558, select.

Boston.$558 per passenger.Departing Wed, 6 Jan, returning Mon, 11 Jan.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Wed, 6 Jan, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Mon, 11 Jan, arriving in St Louis.Price includes taxes and charges.From $558, select.

Boston.$593 per passenger.Departing Wed, 28 Oct, returning Mon, 2 Nov.Return flight with United.Outbound indirect flight with United, departs from St Louis on Wed, 28 Oct, arriving in Boston Logan International.Inbound indirect flight with United, departs from Boston Logan International on Mon, 2 Nov, arriving in St Louis.Price includes taxes and charges.From $593, select.

Boston.$727 per passenger.Departing Thu, 4 Feb, returning Sun, 7 Feb.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Thu, 4 Feb, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Sun, 7 Feb, arriving in St Louis.Price includes taxes and charges.From $727, select.

Boston.$729 per passenger.Departing Sat, 31 Oct, returning Sun, 1 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Sat, 31 Oct, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Sun, 1 Nov, arriving in St Louis.Price includes taxes and charges.From $729, select.

Boston.$844 per passenger.Departing Tue, 25 May, returning Wed, 26 May.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Tue, 25 May, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Wed, 26 May, arriving in St Louis.Price includes taxes and charges.From $844, select.

Boston.$855 per passenger.Departing Sat, 20 Mar, returning Sat, 27 Mar.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Sat, 20 Mar, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Sat, 27 Mar, arriving in St Louis.Price includes taxes and charges.From $855, select.

Boston.$881 per passenger.Departing Fri, 9 Apr, returning Sat, 10 Apr.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Fri, 9 Apr, arriving in Boston Logan International.Inbound direct flight with Southwest Airlines departs from Boston Logan International on Sat, 10 Apr, arriving in St Louis.Price includes taxes and charges.From $881, select.

Boston.$905 per passenger.Departing Tue, 10 Aug, returning Thu, 12 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Tue, 10 Aug, arriving in Boston Logan International.Inbound indirect flight with Delta, departs from Boston Logan International on Thu, 12 Aug, arriving in St Louis.Price includes taxes and charges.From $905, select.

Boston.$905 per passenger.Departing Tue, 24 Nov, returning Sun, 3 Jan.Return flight with United.Outbound indirect flight with United, departs from St Louis on Tue, 24 Nov, arriving in Boston Logan International.Inbound indirect flight with United, departs from Boston Logan International on Sun, 3 Jan, arriving in St Louis.Price includes taxes and charges.From $905, select.

Find the cheapest month to fly from St Louis to Boston Logan International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Boston Logan International flights are currently cheapest in December.

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Direct flights from St Louis to Boston Logan International

St Louis to Boston Logan International: Alternative routes

Compare routes from St Louis to Boston below. You may find an airport to fly into that's cheaper, faster, or easier than Boston Logan International.

St Louis to Boston: Flight information

The things to know before you go.

Cheapest flight found	$419
Cheapest month to fly	December
Average flight time	2 hrs, 38 mins
Most popular airline	Southwest Airlines
Average flights per week	80

Finding cheap flights from St Louis to Boston Logan International: Frequently asked questions

How much are return flights from St Louis to Boston Logan International?

The best price we found for a return flight from St Louis to Boston Logan International is $419. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from St Louis to Boston Logan International?

2 hours and 38 minutes is the average flight time from St Louis to Boston Logan International.

Which airlines fly direct from St Louis to Boston Logan International?

Southwest Airlines, American Airlines and Envoy Air fly direct from St Louis to Boston Logan International.

How many flights are there a week from St Louis to Boston Logan International?

As of October 2026, there are 80 flights per week flying from St Louis to Boston Logan International.

When is the cheapest time to fly from St Louis to Boston Logan International?

The cheapest month to fly from St Louis to Boston Logan International is usually December.

Which upcoming date is cheapest to fly from St Louis Airport to Boston Logan International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Boston Logan International Airport on Thursday, 10 December 2026.

Can I get a direct flight from St Louis Airport to Boston Logan International Airport?

Yes – the average flight time is 2 hours and 38 minutes.

How can I find the best flight deal to Boston Logan International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Boston Logan International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Boston?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Boston is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from St Louis Airport to Boston Logan International with?

Currently, Frontier Airlines and Southwest Airlines offer the cheapest flight tickets to Boston Logan International.

Flying from St Louis Airport (STL) to Boston Logan International Airport (BOS): what you need to know

Around 2 hours 40 minutes is how long you can expect to be travelling on a direct flight from St Louis Airport to Boston Logan International Airport.
Boston is one hour ahead of St Louis and is in the UTC-5 timezone.
Choose from 25 weekly St Louis Airport to Boston Logan International Airport flights. The 07:20 departure with Southwest Airlines is the earliest flight available. Southwest Airlines operates the last service of the day at 21:00.
Get to the airport on time so you don't miss your STL to BOS flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.
During popular months such as July, it's a good idea to get to the airport even earlier. Plan to arrive two hours before domestic departures and four hours ahead of international flights whenever you're travelling during a peak period in general.
American Airlines is your gateway to exploring Boston (and perhaps some other great parts of the United States!). Check out the direct flights from St Louis Airport to Boston Logan International Airport offered by this popular carrier.
The airline most travellers fly with on this route is American Airlines.
American Airlines is the most punctual carrier that offers STL to BOS flights, with 75.52% of its services landing on schedule.
We make it a piece of cake to book a flight with a stopover. To see your options for tickets from St Louis Airport to Boston Logan International Airport, uncheck 'Direct flights only.' Then, choose a flight that has a stop long enough to visit your chosen city. Stopovers between STL and BOS include:
- Detroit Wayne County Airport
- Port Columbus Airport
- Cleveland Hopkins International Airport

How to find the cheapest flights from St Louis Airport (STL) to Boston Logan International Airport (BOS)

Right now, $219 is the lowest price we've found for a one-way St Louis Airport to Boston Logan International Airport flight. The best price for a return ticket is $419. Bear in mind that fares could change due to availability at the time of booking.
It's often best to book in advance if you're hoping to get cheap tickets from STL to BOS. That's because airlines adjust prices based on demand, which tends to rise closer to departure.
Schedule your trip for May. That's the cheapest month for flights from St Louis Airport to Boston Logan International Airport. If you have flexibility with your dates, try out the 'Whole month' tool to see the lowest airfare across each month.
There's no need to check back in every day to see if fares have gone down when you set up a Price Alert. We'll send you an update the moment there's a new deal on cheap flights from STL to BOS.
Select your preferred arrival and departure times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to get the best deals on flights from St Louis Airport to Boston Logan International Airport.

Handy information about St Louis Airport (STL)

STL is located at 10701 Lambert International Blvd..
When it comes to the on-time performance of St Louis Airport, 76% of flights arrive within the expected timeframe.
Central St Louis to St Louis Airport is approximately 24 kilometres. Depending on traffic, it'll take you about 25 minutes to get there if you're ride-sharing, catching a taxi or driving.
Planning to catch public transport? Expect a journey time of around 30 minutes.
Looking for a convenient hotel close to STL? If you've booked an early flight from St Louis Airport to Boston Logan International Airport, these accommodation options will have you sleeping moments from your departure lounge:

Arriving at Boston Logan International Airport (BOS)

If you're getting in on a late St Louis Airport to Boston Logan International Airport flight, few things top the convenience of being close to the terminal. Grab your bags from the carousel and then be resting not long after at one of these hotels near BOS:
Pick up a Boston Logan International Airport rental car and discover Boston and beyond with your own set of wheels. Dollar, Budget and Thrifty are popular providers to choose from here.
Lock in the best rate by reserving your vehicle from Boston Logan International Airport around one week before your travel date.

Getting from Boston Logan International Airport (BOS) to central Boston

The street address for BOS is One Harborside Drive.
From Boston Logan International Airport, Boston is approximately 8 kilometres away. It takes around 20 minutes to drive to the centre.
It takes around 25 minutes if you're using public transport.

When to fly to Boston Logan International Airport (BOS)

The quietest month for a flight from St Louis Airport to Boston Logan International Airport is March, while July is the most popular. Choose the ideal time to go to Boston based on whether you prefer a more relaxed vibe or a faster pace.
When booking your flight from St Louis Airport to Boston Logan International Airport, think about the type of weather you enjoy. July is the warmest month in Boston, with the temperature ranging from 16ºC to 29ºC.
If you'd rather travel in cooler conditions, search for a cheap ticket from STL to BOS in January. Temperatures average between -8ºC and 6ºC then.

Explore more of the United States

Boston is always a good idea, but there are so many other corners of the United States you should also see. About 306 kilometres south-west of Boston, a trip to New York will keep you on the go. Start with leading sights like Central Park, Statue of Liberty and Metropolitan Museum of Art.
If you're eager to discover another great destination in the United States, consider Philadelphia, about 434 kilometres south-west of Boston. Independence Hall, Liberty Bell and Philadelphia Museum of Art are key highlights.