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Cheap flights from St. Louis to Boston from $53

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 2/3. 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.
5:05 pm - 12:30 amSTL-BOS
6h 25m1 stop
6:00 am - 11:27 pmBOS-STL
18h 27m1 stop
$118Frontier
Find Deal
Tue, Jan 7 - Tue, Jan 14
5:05 pm - 12:30 amSTL-BOS
6h 25m1 stop
6:00 am - 11:31 pmBOS-STL
18h 31m1 stop
$136Frontier
Find Deal
Wed, Jan 15 - Wed, Jan 22
5:55 pm - 11:51 pmSTL-BOS
4h 56m1 stop
5:25 am - 9:33 amBOS-STL
5h 08m1 stop
$248Delta
Find Deal
Tue, Dec 31 - Wed, Jan 1
6:00 am - 1:11 pmSTL-BOS
6h 11m1 stop
7:00 am - 9:29 pmBOS-STL
15h 29m1 stop
$340Delta
Find Deal
Wed, Jan 1 - Sat, Jan 4
7:18 am - 1:50 pmSTL-BOS
5h 32m1 stop
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
$355American Airlines
Find Deal
Wed, Jan 15 - Mon, Jan 20
7:30 am - 3:37 pmSTL-BOS
7h 07m1 stop
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
$363American Airlines
Find Deal
Wed, Jan 1 - Sun, Jan 12
6:30 am - 2:30 pmSTL-BOS
7h 00m2 stops
6:00 am - 10:54 amBOS-STL
5h 54m1 stop
$369United Airlines
Find Deal
Wed, Jan 15 - Wed, Jan 22
7:50 am - 5:00 pmSTL-BOS
8h 10m2 stops
5:45 am - 1:45 pmBOS-STL
9h 00m2 stops
$374Southwest
Find Deal
Wed, Jan 15 - Wed, Jan 22
7:10 pm - 10:40 pmSTL-BOS
2h 30mnonstop
7:20 am - 9:35 amBOS-STL
3h 15mnonstop
$386Southwest
Find Deal
Sun, Jan 12 - Fri, Jan 17
1:02 pm - 8:46 pmSTL-BOS
6h 44m2 stops
9:30 am - 2:14 pmBOS-STL
5h 44m1 stop
$394United Airlines
Find Deal
Sun, Jan 12 - Fri, Jan 17
5:05 pm - 12:27 amSTL-BOS
6h 22m1 stop
$53Frontier
Find Deal
Mon, Feb 3
5:05 pm - 12:27 amSTL-BOS
6h 22m1 stop
$54Frontier
Find Deal
Wed, Jan 22
8:10 pm - 11:40 pmSTL-BOS
2h 30mnonstop
$173Southwest
Find Deal
Thu, Feb 27
6:05 am - 12:23 pmSTL-BOS
5h 18m1 stop
$177Delta
Find Deal
Mon, Jan 20
1:30 pm - 5:10 pmSTL-BOS
2h 40mnonstop
$181American Airlines
Find Deal
Tue, Jan 21
7:18 am - 3:27 pmSTL-BOS
7h 09m1 stop
$182American Airlines
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Thu, Jan 16
6:20 am - 3:00 pmSTL-BOS
7h 40m2 stops
$187Southwest
Find Deal
Thu, Jan 16
6:30 am - 6:53 pmSTL-BOS
11h 23m2 stops
$193Delta
Find Deal
Wed, Jan 22
9:44 am - 6:26 pmSTL-BOS
7h 42m2 stops
$222United Airlines
Find Deal
Fri, Jan 17
7:30 am - 11:59 pmSTL-BOS
15h 29m2 stops
$288United Airlines
Find Deal
Thu, Apr 17
5:17 pm - 12:50 amSTL-BOS
6h 33m1 stop
5:25 am - 9:33 amBOS-STL
5h 08m1 stop
$248Delta
Find Deal
Wed, Dec 25 - Wed, Jan 1
2:09 pm - 5:43 pmSTL-BOS
2h 34mnonstop
6:35 am - 1:37 pmBOS-STL
8h 02m1 stop
$371American Airlines
Find Deal
Wed, Dec 25 - Wed, Jan 1
3:53 pm - 12:39 amSTL-BOS
7h 46m1 stop
5:45 am - 11:40 pmBOS-STL
18h 55m1 stop
$403Frontier
Find Deal
Sat, Dec 21 - Mon, Jan 6
6:15 pm - 9:45 pmSTL-BOS
2h 30mnonstop
8:00 am - 10:10 amBOS-STL
3h 10mnonstop
$442Southwest
Find Deal
Wed, Dec 25 - Wed, Jan 1
11:55 am - 10:25 pmSTL-BOS
9h 30m2 stops
5:40 am - 10:00 amBOS-STL
5h 20m1 stop
$465Southwest
Find Deal
Wed, Dec 25 - Wed, Jan 1
7:43 am - 12:44 amSTL-BOS
16h 01m1 stop
6:00 am - 8:47 amBOS-STL
27h 47m1 stop
$624Frontier
Find Deal
Mon, Dec 23 - Thu, Dec 26
2:06 pm - 5:40 pmSTL-BOS
2h 34mnonstop
8:00 am - 1:37 pmBOS-STL
6h 37m1 stop
$726American Airlines
Find Deal
Sat, Dec 21 - Wed, Jan 1
12:55 pm - 8:48 pmSTL-BOS
6h 53m1 stop
6:55 am - 12:09 pmBOS-STL
6h 14m1 stop
$735Delta
Find Deal
Sat, Dec 21 - Wed, Jan 1
8:25 am - 2:26 pmSTL-BOS
5h 01m1 stop
5:45 am - 7:57 pmBOS-STL
15h 12m2 stops
$788United Airlines
Find Deal
Sat, Dec 21 - Wed, Jan 1
8:25 am - 2:26 pmSTL-BOS
5h 01m1 stop
5:45 am - 2:24 pmBOS-STL
9h 39m2 stops
$839United Airlines
Find Deal
Sat, Dec 21 - Mon, Jan 6
1:30 pm - 5:10 pmSTL-BOS
2h 40mnonstop
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
$383American Airlines
Find Deal
Wed, Jan 15 - Wed, Jan 22
7:10 pm - 10:40 pmSTL-BOS
2h 30mnonstop
7:20 am - 9:35 amBOS-STL
3h 15mnonstop
$386Southwest
Find Deal
Sun, Jan 12 - Fri, Jan 17
9:25 am - 1:05 pmSTL-BOS
2h 40mnonstop
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
$404American Airlines
Find Deal
Mon, Jan 13 - Tue, Jan 14
2:21 pm - 5:58 pmSTL-BOS
2h 37mnonstop
11:38 am - 1:51 pmBOS-STL
3h 13mnonstop
$421American Airlines
Find Deal
Thu, Feb 13 - Sun, Feb 16
1:30 pm - 5:10 pmSTL-BOS
2h 40mnonstop
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
$428American Airlines
Find Deal
Tue, Jan 7 - Tue, Jan 14
2:21 pm - 5:58 pmSTL-BOS
2h 37mnonstop
11:38 am - 1:51 pmBOS-STL
3h 13mnonstop
$441American Airlines
Find Deal
Thu, Feb 20 - Sun, Feb 23
10:30 am - 2:08 pmSTL-BOS
2h 38mnonstop
7:00 am - 9:14 amBOS-STL
3h 14mnonstop
$442American Airlines
Find Deal
Sun, Apr 6 - Tue, Apr 8
9:28 am - 1:01 pmSTL-BOS
2h 33mnonstop
11:30 am - 1:52 pmBOS-STL
3h 22mnonstop
$456American Airlines
Find Deal
Tue, Mar 25 - Sun, Mar 30
9:28 am - 1:01 pmSTL-BOS
2h 33mnonstop
11:38 am - 1:51 pmBOS-STL
3h 13mnonstop
$461American Airlines
Find Deal
Sun, Mar 23 - Tue, Mar 25
8:50 pm - 12:20 amSTL-BOS
2h 30mnonstop
6:55 am - 9:00 amBOS-STL
3h 05mnonstop
$495Southwest
Find Deal
Fri, Mar 14 - Mon, Mar 17

Frontier flights from St. Louis to Boston

Our best Frontier deals on St. Louis to Boston flight tickets
Frontier
Jan 7
STL5:05 pmLambert-St Louis
6h 25m
1 stop
BOS12:30 amBoston Logan Intl
Jan 14
BOS6:00 amBoston Logan Intl
18h 27m
1 stop
STL11:27 pmLambert-St Louis
Frontier
Jan 15
STL5:05 pmLambert-St Louis
6h 25m
1 stop
BOS12:30 amBoston Logan Intl
Jan 22
BOS6:00 amBoston Logan Intl
18h 31m
1 stop
STL11:31 pmLambert-St Louis
Frontier
Feb 17
STL5:20 pmLambert-St Louis
6h 24m
1 stop
BOS12:44 amBoston Logan Intl
Feb 25
BOS6:00 amBoston Logan Intl
18h 43m
1 stop
STL11:43 pmLambert-St Louis

Spirit Airlines flights from St. Louis to Boston

Our best Spirit Airlines deals on St. Louis to Boston flight tickets
Spirit Airlines
Jan 16
STL4:28 pmLambert-St Louis
17h 08m
1 stop
BOS10:36 amBoston Logan Intl
Jan 23
BOS6:00 amBoston Logan Intl
9h 43m
1 stop
STL2:43 pmLambert-St Louis
Spirit Airlines
Jan 7
STL4:27 pmLambert-St Louis
27h 40m
2 stops
BOS9:07 pmBoston Logan Intl
Jan 14
BOS6:00 amBoston Logan Intl
9h 43m
1 stop
STL2:43 pmLambert-St Louis
Spirit Airlines
Jan 7
STL4:27 pmLambert-St Louis
27h 40m
3 stops
BOS9:07 pmBoston Logan Intl
Jan 14
BOS6:00 amBoston Logan Intl
9h 43m
1 stop
STL2:43 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 typical price of a round-trip flight between St. Louis and Boston?

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 $317. 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 $389. 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 $470.

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 $422 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 38 days ahead of your departure date. In general, you can expect to find flights to Boston for around $410 when searching 38 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 $329 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 69% 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 December 2024, prices for St. Louis to Boston flights are approximately 31% cheaper 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

$53

Fastest flight time

2h 30m

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 $53. The best round-trip flight deal from St. Louis to Boston found on momondo in the last 72 hours is $118.
The fastest flight from St. Louis to Boston takes 2h 30m
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
3,475 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $163Free CancellationRating
6.3
8,120 reviews
Search Spirit Airlines flights
DeltaPriceFrom $195Free CancellationRating
8.0
8,601 reviews
Search Delta flights
United AirlinesPriceFrom $247Free CancellationRating
7.4
9,043 reviews
Search United Airlines flights
American AirlinesPriceFrom $252Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $286Free CancellationRating
8.1
4,821 reviews
Search Southwest flights
  • Southwest Flights From St. Louis to Boston

    The lowest priced Southwest flight from St. Louis to Boston from the last 72 hours was $286. Generally, Southwest has 12 flights on this route every week with an average price of $462. 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 $252, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $417 round-trip. American Airlines operates 8 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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