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Cheap flights from Boston to St. Louis from $60

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to St. Louis departing on 4/1. 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 Boston to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from Boston to St. Louis 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 Boston to St. Louis.

Cheap last minute flights

Planning a quick getaway from Boston to St. Louis? 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 St. Louis, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Boston to St. Louis

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

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
6:00 am - 11:31 pmBOS-STL
18h 31m1 stop
5:05 pm - 12:27 amSTL-BOS
6h 22m1 stop
$113Frontier
Find Deal
Sat, Jan 25 - Tue, Jan 28
6:00 am - 11:31 pmBOS-STL
18h 31m1 stop
5:05 pm - 12:27 amSTL-BOS
6h 22m1 stop
$119Frontier
Find Deal
Sat, Feb 1 - Mon, Feb 3
5:35 am - 10:05 amBOS-STL
5h 30m1 stop
3:32 pm - 11:59 pmSTL-BOS
7h 27m2 stops
$202United Airlines
Find Deal
Tue, Feb 25 - Tue, Feb 25
6:55 pm - 11:30 pmBOS-STL
5h 35m1 stop
1:02 pm - 8:46 pmSTL-BOS
6h 44m2 stops
$222United Airlines
Find Deal
Mon, Feb 3 - Wed, Feb 5
5:20 am - 9:36 amBOS-STL
5h 16m1 stop
12:52 pm - 8:31 pmSTL-BOS
6h 39m1 stop
$227Delta
Find Deal
Tue, Jan 21 - Sat, Jan 25
8:00 am - 12:32 pmBOS-STL
5h 32m1 stop
6:30 am - 12:05 pmSTL-BOS
4h 35m1 stop
$237Delta
Find Deal
Mon, Jan 20 - Thu, Jan 23
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
5:40 am - 3:49 pmSTL-BOS
9h 09m1 stop
$302American Airlines
Find Deal
Tue, Jan 28 - Wed, Jan 29
11:38 am - 1:51 pmBOS-STL
3h 13mnonstop
12:00 pm - 10:12 pmSTL-BOS
9h 12m1 stop
$312American Airlines
Find Deal
Tue, Feb 25 - Wed, Feb 26
7:20 am - 9:35 amBOS-STL
3h 15mnonstop
7:10 pm - 10:40 pmSTL-BOS
2h 30mnonstop
$345Southwest
Find Deal
Thu, Feb 20 - Mon, Feb 24
5:45 am - 1:15 pmBOS-STL
8h 30m2 stops
6:00 am - 11:20 amSTL-BOS
4h 20m1 stop
$370Southwest
Find Deal
Fri, Feb 28 - Sun, Mar 2
6:00 am - 11:46 pmBOS-STL
18h 46m1 stop
$60Frontier
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Tue, Apr 1
6:00 am - 2:43 pmBOS-STL
9h 43m1 stop
$61Spirit Airlines
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Tue, Feb 4
5:45 am - 10:24 amBOS-STL
5h 39m1 stop
$99United Airlines
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Wed, Feb 12
8:00 am - 12:31 pmBOS-STL
5h 31m1 stop
$119Delta
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Sat, Feb 1
6:00 am - 3:38 pmBOS-STL
10h 38m2 stops
$144United Airlines
Find Deal
Tue, Feb 4
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
$173American Airlines
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Mon, Feb 3
6:00 am - 11:32 amBOS-STL
6h 32m1 stop
$182American Airlines
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Mon, Feb 3
6:55 am - 11:47 amBOS-STL
5h 52m1 stop
$183Delta
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Fri, Jan 31
5:45 am - 1:45 pmBOS-STL
9h 00m2 stops
$188Southwest
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Thu, Jan 30
8:30 am - 4:55 pmBOS-STL
9h 25m2 stops
$197Southwest
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Wed, Feb 5
6:00 am - 11:27 pmBOS-STL
18h 27m1 stop
5:05 pm - 12:30 amSTL-BOS
6h 25m1 stop
$211Frontier
Find Deal
Tue, Jan 7 - Tue, Jan 14
6:00 am - 11:27 pmBOS-STL
18h 27m1 stop
5:05 pm - 12:27 amSTL-BOS
6h 22m1 stop
$237Frontier
Find Deal
Thu, Jan 9 - Thu, Jan 16
6:55 am - 9:10 amBOS-STL
3h 15mnonstop
8:30 am - 12:05 pmSTL-BOS
2h 35mnonstop
$541Southwest
Find Deal
Thu, Jan 9 - Thu, Jan 16
5:45 am - 10:25 amBOS-STL
5h 40m1 stop
8:30 am - 12:05 pmSTL-BOS
2h 35mnonstop
$551Southwest
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Thu, Jan 9 - Thu, Jan 16
5:40 am - 11:47 amBOS-STL
7h 07m1 stop
6:00 am - 12:37 pmSTL-BOS
5h 37m1 stop
$691Delta
Find Deal
Thu, Jan 9 - Sun, Jan 12
3:14 pm - 12:48 pmBOS-STL
22h 34m1 stop
6:30 am - 2:30 pmSTL-BOS
7h 00m2 stops
$742United Airlines
Find Deal
Thu, Jan 9 - Sun, Jan 12
6:00 am - 2:58 pmBOS-STL
9h 58m1 stop
1:30 pm - 5:10 pmSTL-BOS
2h 40mnonstop
$786American Airlines
Find Deal
Tue, Jan 7 - Tue, Jan 14
6:00 am - 11:32 amBOS-STL
6h 32m1 stop
9:25 am - 1:05 pmSTL-BOS
2h 40mnonstop
$841American Airlines
Find Deal
Thu, Jan 9 - Sun, Jan 12
5:45 am - 2:14 pmBOS-STL
9h 29m2 stops
6:30 am - 2:30 pmSTL-BOS
7h 00m2 stops
$861United Airlines
Find Deal
Thu, Jan 9 - Sun, Jan 12
5:25 am - 9:33 amBOS-STL
5h 08m1 stop
7:15 am - 1:39 pmSTL-BOS
5h 24m1 stop
$1,011Delta
Find Deal
Sun, Jan 5 - Tue, Jan 7
7:20 am - 9:35 amBOS-STL
3h 15mnonstop
7:10 pm - 10:40 pmSTL-BOS
2h 30mnonstop
$345Southwest
Find Deal
Thu, Feb 20 - Mon, Feb 24
6:30 am - 8:47 amBOS-STL
3h 17mnonstop
2:21 pm - 5:58 pmSTL-BOS
2h 37mnonstop
$353American Airlines
Find Deal
Tue, Feb 25 - Wed, Feb 26
2:40 pm - 4:55 pmBOS-STL
3h 15mnonstop
1:50 pm - 5:20 pmSTL-BOS
2h 30mnonstop
$361Southwest
Find Deal
Sat, Jan 25 - Tue, Jan 28
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
9:25 am - 1:05 pmSTL-BOS
2h 40mnonstop
$378American Airlines
Find Deal
Fri, Feb 7 - Mon, Feb 10
6:25 am - 8:45 amBOS-STL
3h 20mnonstop
7:45 am - 11:20 amSTL-BOS
2h 35mnonstop
$383Southwest
Find Deal
Fri, Feb 28 - Sun, Mar 2
6:15 am - 8:30 amBOS-STL
3h 15mnonstop
1:50 pm - 5:20 pmSTL-BOS
2h 30mnonstop
$411Southwest
Find Deal
Sat, Jan 18 - Thu, Jan 23
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
1:30 pm - 5:10 pmSTL-BOS
2h 40mnonstop
$412American Airlines
Find Deal
Wed, Jan 29 - Fri, Jan 31
11:41 am - 1:49 pmBOS-STL
3h 08mnonstop
9:15 am - 12:58 pmSTL-BOS
2h 43mnonstop
$421American Airlines
Find Deal
Fri, Apr 4 - Sun, Apr 6
6:30 am - 8:54 amBOS-STL
3h 24mnonstop
1:30 pm - 5:10 pmSTL-BOS
2h 40mnonstop
$436American Airlines
Find Deal
Tue, Jan 21 - Thu, Jan 23
6:30 am - 8:58 amBOS-STL
3h 28mnonstop
9:28 am - 1:01 pmSTL-BOS
2h 33mnonstop
$441American Airlines
Find Deal
Fri, Mar 14 - Wed, Mar 19

Spirit Airlines flights from Boston to St. Louis

Our best Spirit Airlines deals on Boston to St. Louis flight tickets
Spirit Airlines
Feb 6
BOS6:00 amBoston Logan Intl
9h 43m
1 stop
STL2:43 pmLambert-St Louis
Feb 11
STL3:48 pmLambert-St Louis
6h 44m
1 stop
BOS11:32 pmBoston Logan Intl
Spirit Airlines
May 10
BOS12:09 pmBoston Logan Intl
7h 18m
1 stop
STL6:27 pmLambert-St Louis
May 13
STL7:27 pmLambert-St Louis
14h 47m
1 stop
BOS11:14 amBoston Logan Intl
Spirit Airlines
Feb 6
BOS6:00 amBoston Logan Intl
9h 43m
1 stop
STL2:43 pmLambert-St Louis
Feb 11
STL3:48 pmLambert-St Louis
6h 44m
1 stop
BOS11:32 pmBoston Logan Intl

United Airlines flights from Boston to St. Louis

Our best United Airlines deals on Boston to St. Louis flight tickets
United Airlines
Feb 25
BOS5:35 amBoston Logan Intl
5h 30m
1 stop
STL10:05 amLambert-St Louis
Feb 25
STL3:32 pmLambert-St Louis
7h 27m
2 stops
BOS11:59 pmBoston Logan Intl
United Airlines
Feb 3
BOS6:55 pmBoston Logan Intl
5h 35m
1 stop
STL11:30 pmLambert-St Louis
Feb 5
STL1:02 pmLambert-St Louis
6h 44m
2 stops
BOS8:46 pmBoston Logan Intl
United Airlines
Jan 18
BOS6:00 amBoston Logan Intl
5h 54m
1 stop
STL10:54 amLambert-St Louis
Jan 23
STL6:30 amLambert-St Louis
7h 00m
2 stops
BOS2:30 pmBoston Logan Intl

See travel insights to St. Louis from

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

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 St. Louis?

In general, September is the cheapest month to fly from Boston to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $377. The month of January is another great option to travel to St. Louis, with average flight prices from Boston averaging around $391.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $391. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $470. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Boston at noon is the least expensive time of day to depart. momondo users have found prices as low as $416 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $448 per ticket.

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

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

How far in advance should I book a flight to St. Louis?

The best time to book a flight to St. Louis from Boston is 58 days out, which is when prices tend to be around $427. In the past 72 hours, momondo users found flights from Boston to St. Louis for as low as $293.

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

There are 4 cabin classes available to choose from on Boston Logan Intl to Lambert-St Louis 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 Boston to St. Louis flights?

You could potentially save up to 65% on your flight if you consider stops on a Boston to St. Louis flight.

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

As of January 2025, prices for Boston to St. Louis flights are approximately 18% more expensive when compared to flights at the same time last year.

When to book flights from Boston to St. Louis

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

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

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

Best Price Found

$60

Fastest flight time

2h 55m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Boston in the past 72 hours is $60. The best round-trip flight deal from Boston to St. Louis found on momondo in the last 72 hours is $113.
The fastest flight from Boston to St. Louis takes 2h 55m
Direct flights go from Boston to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

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

    Lambert-St Louis is 1035.0 mi away from Boston Logan Intl. Flights usually cover this in 3h 13m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Boston Logan Intl Airport to Lambert-St Louis Airport were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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


Best airlines flying from Boston to St. Louis

Compare and see reviews for airlines that fly from Boston to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $107Free CancellationRating
6.3
8,088 reviews
Search Spirit Airlines flights
FrontierPriceFrom $118Free CancellationRating
6.0
3,451 reviews
Search Frontier flights
DeltaPriceFrom $196Free CancellationRating
8.0
8,526 reviews
Search Delta flights
United AirlinesPriceFrom $257Free CancellationRating
7.4
8,963 reviews
Search United Airlines flights
American AirlinesPriceFrom $261Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $308Free CancellationRating
8.1
4,679 reviews
Search Southwest flights
  • Southwest Flights From Boston to St. Louis

    Southwest operates around 15 flights from Boston to St. Louis every week. The average price of these flights found in the last 72 hours has been $444, but momondo users have found Southwest deals from Boston to St. Louis from as low as $308 round-trip. Southwest has been scored 8.1/10 in 4,679 reviews.

  • American Airlines Flights From Boston to St. Louis

    The best American Airlines deal for Boston to St. Louis flight tickets found on momondo in the last 72 hours was $261, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $435 round-trip. American Airlines operates 8 flights out of Boston into St. Louis 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 Boston to St. Louis?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Boston to St. Louis for you.

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

Yes. All flights to St. Louis from Boston on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between Boston and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to St. Louis from Boston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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