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Cheap flights from St. Louis to Boston from $54

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Boston departing on 12/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Boston

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Boston that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Boston.

Cheap last minute flights

Planning a quick getaway from St. Louis to Boston? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Boston, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to Boston

Find recent round-trip train or bus tickets from St. Louis to Boston.

All round-trip flight deals to Boston

The cheapest plane tickets to Boston found on KAYAK recently.
4:26 pm - 12:38 amSTL-BOS
7h 12m1 stop
5:00 am - 3:21 pmBOS-STL
11h 21m1 stop
$113Spirit Airlines
Find Deal
Thu, Dec 5 - Sun, Dec 8
5:02 pm - 12:30 amSTL-BOS
6h 28m1 stop
6:00 am - 11:24 pmBOS-STL
18h 24m1 stop
$118Frontier
Find Deal
Mon, Dec 9 - Thu, Dec 12
10:13 am - 5:48 pmSTL-BOS
6h 35m1 stop
6:35 pm - 11:37 pmBOS-STL
6h 02m1 stop
$216Delta
Find Deal
Tue, Dec 24 - Tue, Jan 7
10:18 am - 6:31 pmSTL-BOS
7h 13m2 stops
9:20 am - 2:36 pmBOS-STL
6h 16m1 stop
$221United Airlines
Find Deal
Wed, Feb 19 - Tue, Feb 25
10:13 am - 5:48 pmSTL-BOS
6h 35m1 stop
6:55 am - 11:47 amBOS-STL
5h 52m1 stop
$226Delta
Find Deal
Tue, Dec 24 - Mon, Jan 6
5:28 pm - 11:17 pmSTL-BOS
4h 49m1 stop
7:30 am - 3:34 pmBOS-STL
9h 04m2 stops
$301United Airlines
Find Deal
Wed, Dec 4 - Tue, Dec 10
9:25 am - 1:03 pmSTL-BOS
2h 38mnonstop
2:26 pm - 10:13 pmBOS-STL
8h 47m1 stop
$325American Airlines
Find Deal
Wed, Dec 11 - Thu, Dec 12
1:45 pm - 5:20 pmSTL-BOS
2h 35mnonstop
6:25 am - 8:43 amBOS-STL
3h 18mnonstop
$343American Airlines
Find Deal
Wed, Dec 11 - Thu, Dec 12
9:30 am - 1:00 pmSTL-BOS
2h 30mnonstop
7:40 am - 9:50 amBOS-STL
3h 10mnonstop
$344Southwest
Find Deal
Wed, Dec 11 - Sat, Dec 14
9:30 am - 1:00 pmSTL-BOS
2h 30mnonstop
7:05 pm - 9:15 pmBOS-STL
3h 10mnonstop
$383Southwest
Find Deal
Wed, Dec 25 - Sat, Jan 4
5:02 pm - 12:30 amSTL-BOS
6h 28m1 stop
$54Frontier
Find Deal
Mon, Dec 9
5:05 pm - 12:27 amSTL-BOS
6h 22m1 stop
$55Frontier
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Wed, Jan 22
10:20 am - 5:24 pmSTL-BOS
6h 04m1 stop
$108Delta
Find Deal
Tue, Feb 18
9:44 am - 6:26 pmSTL-BOS
7h 42m2 stops
$113United Airlines
Find Deal
Tue, Jan 7
6:01 am - 1:19 pmSTL-BOS
6h 18m1 stop
$118Delta
Find Deal
Thu, Dec 19
6:30 am - 2:30 pmSTL-BOS
7h 00m2 stops
$123United Airlines
Find Deal
Thu, Jan 9
5:45 am - 3:10 pmSTL-BOS
8h 25m1 stop
$152American Airlines
Find Deal
Mon, Mar 3
1:30 pm - 5:10 pmSTL-BOS
2h 40mnonstop
$172American Airlines
Find Deal
Tue, Jan 7
10:40 am - 7:15 pmSTL-BOS
7h 35m2 stops
$186Southwest
Find Deal
Mon, Jan 6
4:05 pm - 7:30 pmSTL-BOS
2h 25mnonstop
$204Southwest
Find Deal
Sat, Dec 14
5:21 pm - 1:06 amSTL-BOS
6h 45m1 stop
6:00 am - 11:24 pmBOS-STL
18h 24m1 stop
Sun, Nov 24 - Wed, Dec 4
6:32 pm - 12:59 amSTL-BOS
29h 27m1 stop
6:00 am - 5:41 pmBOS-STL
12h 41m1 stop
$318Frontier
Find Deal
Sat, Nov 23 - Thu, Nov 28
5:21 pm - 1:06 amSTL-BOS
6h 45m1 stop
6:55 pm - 4:26 pmBOS-STL
22h 31m1 stop
$544Spirit Airlines
Find Deal
Sun, Nov 24 - Fri, Nov 29
8:05 am - 4:22 pmSTL-BOS
7h 17m2 stops
5:45 am - 10:16 amBOS-STL
5h 31m1 stop
$610United Airlines
Find Deal
Sun, Nov 24 - Wed, Dec 4
5:21 pm - 1:06 amSTL-BOS
6h 45m1 stop
6:55 pm - 4:26 pmBOS-STL
22h 31m1 stop
$644Spirit Airlines
Find Deal
Sun, Nov 24 - Fri, Nov 29
8:05 am - 4:22 pmSTL-BOS
7h 17m2 stops
7:30 am - 3:34 pmBOS-STL
9h 04m2 stops
$660United Airlines
Find Deal
Sun, Nov 24 - Wed, Dec 4
9:20 am - 12:55 pmSTL-BOS
2h 35mnonstop
6:25 am - 8:43 amBOS-STL
3h 18mnonstop
$716American Airlines
Find Deal
Sun, Nov 24 - Fri, Nov 29
5:45 am - 1:08 pmSTL-BOS
6h 23m1 stop
6:25 am - 8:43 amBOS-STL
3h 18mnonstop
$726American Airlines
Find Deal
Sun, Nov 24 - Fri, Nov 29
7:40 am - 11:10 amSTL-BOS
2h 30mnonstop
6:55 am - 9:05 amBOS-STL
3h 10mnonstop
$756Southwest
Find Deal
Sat, Nov 23 - Thu, Nov 28
2:50 pm - 6:20 pmSTL-BOS
2h 30mnonstop
8:50 am - 1:35 pmBOS-STL
5h 45m1 stop
$901Southwest
Find Deal
Tue, Nov 26 - Sun, Dec 1
1:45 pm - 5:20 pmSTL-BOS
2h 35mnonstop
10:38 am - 1:00 pmBOS-STL
3h 22mnonstop
$343American Airlines
Find Deal
Tue, Dec 17 - Wed, Jan 8
9:30 am - 1:00 pmSTL-BOS
2h 30mnonstop
7:40 am - 9:50 amBOS-STL
3h 10mnonstop
$344Southwest
Find Deal
Wed, Dec 11 - Sat, Dec 14
2:06 pm - 5:40 pmSTL-BOS
2h 34mnonstop
11:24 am - 1:34 pmBOS-STL
3h 10mnonstop
$375American Airlines
Find Deal
Thu, Dec 19 - Wed, Jan 1
1:45 pm - 5:20 pmSTL-BOS
2h 35mnonstop
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
$382American Airlines
Find Deal
Thu, Dec 12 - Sun, Jan 12
9:30 am - 1:00 pmSTL-BOS
2h 30mnonstop
7:05 pm - 9:15 pmBOS-STL
3h 10mnonstop
$383Southwest
Find Deal
Wed, Dec 25 - Sat, Jan 4
9:25 am - 1:05 pmSTL-BOS
2h 40mnonstop
11:24 am - 1:34 pmBOS-STL
3h 10mnonstop
$403American Airlines
Find Deal
Fri, Dec 20 - Wed, Jan 1
9:25 am - 1:05 pmSTL-BOS
2h 40mnonstop
6:25 am - 8:42 amBOS-STL
3h 17mnonstop
$421American Airlines
Find Deal
Mon, Dec 23 - Fri, Dec 27
1:50 pm - 5:20 pmSTL-BOS
2h 30mnonstop
7:10 pm - 9:25 pmBOS-STL
3h 15mnonstop
$422Southwest
Find Deal
Sun, Feb 9 - Fri, Feb 14
1:45 pm - 5:20 pmSTL-BOS
2h 35mnonstop
6:25 am - 8:43 amBOS-STL
3h 18mnonstop
$424American Airlines
Find Deal
Thu, Dec 12 - Mon, Dec 16
2:21 pm - 5:58 pmSTL-BOS
2h 37mnonstop
11:38 am - 1:51 pmBOS-STL
3h 13mnonstop
$434American Airlines
Find Deal
Thu, Feb 20 - Sun, Feb 23

Spirit Airlines flights from St. Louis to Boston

Our best Spirit Airlines deals on St. Louis to Boston flight tickets
Spirit Airlines
Dec 5
STL4:26 pmLambert-St Louis
7h 12m
1 stop
BOS12:38 amBoston Logan Intl
Dec 8
BOS5:00 amBoston Logan Intl
11h 21m
1 stop
STL3:21 pmLambert-St Louis
Spirit Airlines
Dec 5
STL4:26 pmLambert-St Louis
16h 25m
2 stops
BOS9:51 amBoston Logan Intl
Dec 8
BOS5:00 amBoston Logan Intl
11h 21m
1 stop
STL3:21 pmLambert-St Louis
Spirit Airlines
Dec 5
STL4:26 pmLambert-St Louis
21h 30m
3 stops
BOS2:56 pmBoston Logan Intl
Dec 8
BOS5:00 amBoston Logan Intl
11h 21m
1 stop
STL3:21 pmLambert-St Louis

Frontier flights from St. Louis to Boston

Our best Frontier deals on St. Louis to Boston flight tickets
Frontier
Dec 9
STL5:02 pmLambert-St Louis
6h 28m
1 stop
BOS12:30 amBoston Logan Intl
Dec 12
BOS6:00 amBoston Logan Intl
18h 24m
1 stop
STL11:24 pmLambert-St Louis
Frontier
Jan 27
STL5:05 pmLambert-St Louis
6h 22m
1 stop
BOS12:27 amBoston Logan Intl
Jan 31
BOS6:00 amBoston Logan Intl
18h 31m
1 stop
STL11:31 pmLambert-St Louis
Frontier
Dec 4
STL5:02 pmLambert-St Louis
6h 28m
1 stop
BOS12:30 amBoston Logan Intl
Dec 8
BOS6:00 amBoston Logan Intl
18h 24m
1 stop
STL11:24 pmLambert-St Louis

See travel insights to Boston from

How to get the cheapest flight ticket from St. Louis to Boston

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Boston?

In general, February is the cheapest month to fly from St. Louis to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $307. If you aren’t able to travel during the month of February, then book flights to Boston from St. Louis during August instead. Flights to Boston in August, while not as cheap as those in February, still average around $365.

What is the cheapest day to depart on your flight to Boston?

The cheapest day to depart from St. Louis to Boston is on a Tuesday when prices can be found for as low as $377. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Sunday is $490.

What is the cheapest time of day to depart on your flight to Boston?

According to our data, the cheapest time of day to fly to Boston is in the evening. momondo users have found flights departing from St. Louis to Boston in the evening for as low as $376. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Boston, so prices are often more expensive at around $412 per ticket.

What is the cheapest Lambert-St Louis to Boston Logan Intl flight route?

Fly from Lambert-St Louis to Boston Logan Intl for the best Lambert-St Louis - Boston Logan Intl flight prices

How far in advance should I book a flight to Boston?

You are more likely to see cheaper flights to Boston from St. Louis when booking 32 days ahead of your departure date. In general, you can expect to find flights to Boston for around $404 when searching 32 days out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from St. Louis for as low as $318 on momondo.

What cabin class options are available on Lambert-St Louis to Boston Logan Intl flights?

There are 4 cabin classes available to choose from on Lambert-St Louis to Boston Logan Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Boston flights?

You could potentially save up to 68% on your flight if you consider stops on a St. Louis to Boston flight.

How have St. Louis to Boston flight prices changed over time?

As of November 2024, prices for St. Louis to Boston flights are approximately 18% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Boston

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Boston according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Boston (STL to BOS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Boston

Best Price Found

$54

Fastest flight time

2h 25m

Direct flights

Every day

Airports in Boston

1 airport
The best one-way flight to Boston from St. Louis in the past 72 hours is $54. The best round-trip flight deal from St. Louis to Boston found on momondo in the last 72 hours is $113.
The fastest flight from St. Louis to Boston takes 2h 25m
Direct flights go from St. Louis to Boston every day.
There is 1 airport near Boston: Boston Logan Intl (BOS)

  • How far is Lambert-St Louis to Boston Logan Intl by plane?

    Boston Logan Intl is 1035.0 mi away from Lambert-St Louis. By plane, this route typically takes 2h 30m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Boston Logan Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Boston Logan Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Boston Logan Intl Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Boston Logan Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Boston Logan Intl Airport.

  • What documentation or ID do you need to fly to Boston Logan Intl Airport?

    The travel and health documents required for your trip to Boston Logan Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Boston Logan Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from St. Louis to Boston?

  • What is the most popular airline from St. Louis to Boston?


Best airlines flying from St. Louis to Boston

Compare and see reviews for airlines that fly from St. Louis to Boston with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $97Free CancellationRating
6.1
3,536 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $163Free CancellationRating
6.3
8,169 reviews
Search Spirit Airlines flights
DeltaPriceFrom $195Free CancellationRating
8.0
8,755 reviews
Search Delta flights
United AirlinesPriceFrom $201Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights
SouthwestPriceFrom $204Free CancellationRating
8.1
5,005 reviews
Search Southwest flights
American AirlinesPriceFrom $251Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
  • Southwest Flights From St. Louis to Boston

    The lowest priced Southwest flight from St. Louis to Boston from the last 72 hours was $204. Generally, Southwest has 12 flights on this route every week with an average price of $459. Southwest is rated 8.1/10 by our users.

  • American Airlines Flights From St. Louis to Boston

    The best American Airlines deal for St. Louis to Boston flight tickets found on momondo in the last 72 hours was $251, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $412 round-trip. American Airlines operates 11 flights out of St. Louis into Boston in an average week, so prices vary by time and availability. 10,000 American Airlines reviews by users on momondo have scored the airline at 7.2/10.


Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Boston?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Boston. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Boston with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Boston from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Boston?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Boston from St. Louis.

I’m not ready to book a flight from St. Louis to Boston right now. Can momondo alert me if prices change?

Price alerts on flights to Boston from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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