What airlines fly to St. Louis?

American Airlines, Southwest and Delta are the top three most popular airlines that fly to St. Louis from Boston according to our data. American Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 6 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Boston Logan Intl to Lambert-St Louis?

Spirit Airlines, American Airlines, and Southwest are the most popular carriers operating from Boston Logan Intl to Lambert-St Louis

How many flights depart from Boston to St. Louis on average per week?

32 flights are operational weekly from Boston to St. Louis as of July 2025. The most popular departure day for this route is Tue, with 19% of flights per week taking off on this day.

How many flights depart from Boston to St. Louis on average per day?

As of July 2025, there are 4 flights per day flying from Boston to St. Louis. The most common time of day flights depart is 7:00AM, with 56% of flights taking off at noon.

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?

As of July 2025, there are 6 operators available to choose from 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.

$66 Cheap Flights from Boston to St. Louis in 2025

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6:30 am - 1:32 pmBOS-STL

8h 02m1 stop

2:30 pm - 10:34 pmSTL-BOS

7h 04m1 stop

$129Spirit Airlines

Find Deal

jue., ago. 14 - dom., ago. 17

6:10 am - 1:35 pmBOS-STL

8h 25m1 stop

2:30 pm - 10:33 pmSTL-BOS

7h 03m1 stop

$130Spirit Airlines

Find Deal

jue., sep. 11 - dom., sep. 14

6:30 am - 1:32 pmBOS-STL

8h 02m1 stop

2:30 pm - 10:34 pmSTL-BOS

7h 04m1 stop

$131Spirit Airlines

Find Deal

vie., ago. 22 - lun., ago. 25

6:30 am - 1:32 pmBOS-STL

8h 02m1 stop

2:30 pm - 10:34 pmSTL-BOS

7h 04m1 stop

$149Spirit Airlines

Find Deal

jue., ago. 21 - dom., ago. 24

6:30 am - 1:32 pmBOS-STL

8h 02m1 stop

2:30 pm - 10:34 pmSTL-BOS

7h 04m1 stop

$150Spirit Airlines

Find Deal

jue., ago. 28 - dom., ago. 31

6:45 pm - 8:45 pmBOS-STL

3h 00mnonstop

7:25 pm - 11:00 pmSTL-BOS

2h 35mnonstop

$166Southwest

Find Deal

vie., ago. 22 - lun., ago. 25

6:15 am - 12:30 pmBOS-STL

7h 15m1 stop

1:35 pm - 10:30 pmSTL-BOS

7h 55m1 stop

$168Southwest

Find Deal

sáb., sep. 13 - mié., sep. 17

5:28 am - 1:12 pmBOS-STL

8h 44m1 stop

7:23 am - 4:50 pmSTL-BOS

8h 27m1 stop

$178American Airlines

Find Deal

sáb., ago. 23 - dom., ago. 24

7:00 am - 9:15 amBOS-STL

3h 15mnonstop

6:06 am - 3:19 pmSTL-BOS

8h 13m1 stop

$181American Airlines

Find Deal

jue., ago. 7 - mié., ago. 13

5:25 pm - 10:02 pmBOS-STL

5h 37m1 stop

6:49 pm - 1:20 amSTL-BOS

5h 31m1 stop

$217Delta

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mié., ago. 13 - vie., ago. 15

Spirit Airlines flights from Boston to St. Louis

Our best Spirit Airlines deals on Boston to St. Louis flight tickets

Spirit Airlines

Aug 14

BOS6:30 amBoston Logan Intl

8h 02m

1 stop

STL1:32 pmLambert-St Louis

Aug 17

STL2:30 pmLambert-St Louis

7h 04m

1 stop

BOS10:34 pmBoston Logan Intl

$129

Find similar

Spirit Airlines

Sep 11

BOS6:10 amBoston Logan Intl

8h 25m

1 stop

STL1:35 pmLambert-St Louis

Sep 14

STL2:30 pmLambert-St Louis

7h 03m

1 stop

BOS10:33 pmBoston Logan Intl

$130

Find similar

Spirit Airlines

Aug 22

BOS6:30 amBoston Logan Intl

8h 02m

1 stop

STL1:32 pmLambert-St Louis

Aug 25

STL2:30 pmLambert-St Louis

7h 04m

1 stop

BOS10:34 pmBoston Logan Intl

$131

Find similar

American Airlines flights from Boston to St. Louis

Our best American Airlines deals on Boston to St. Louis flight tickets

American Airlines

Aug 23

BOS5:28 amBoston Logan Intl

8h 44m

1 stop

STL1:12 pmLambert-St Louis

Aug 24

STL7:23 amLambert-St Louis

8h 27m

1 stop

BOS4:50 pmBoston Logan Intl

$178

Find similar

American Airlines

Aug 7

BOS7:00 amBoston Logan Intl

3h 15m

STL9:15 amLambert-St Louis

Aug 13

STL6:06 amLambert-St Louis

8h 13m

1 stop

BOS3:19 pmBoston Logan Intl

$181

Find similar

American Airlines

Aug 23

BOS5:28 amBoston Logan Intl

8h 44m

1 stop

STL1:12 pmLambert-St Louis

Aug 25

STL9:45 amLambert-St Louis

2h 41m

BOS1:26 pmBoston Logan Intl

$182

Find similar

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

Prices

Airlines

Other information

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 $374. The month of August 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 Wednesday when prices can be found for as low as $423. 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 $504. 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 in the evening is the least expensive time of day to depart. momondo users have found prices as low as $431 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $458 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?

You are more likely to see cheaper flights to St. Louis from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $435 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Boston for as low as $382 on momondo.

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 10% 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 July 2025, prices for Boston to St. Louis flights are approximately 12% cheaper 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	$66
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 $66. The best round-trip flight deal from Boston to St. Louis found on momondo in the last 72 hours is $129.

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)

Search flight deals

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 2h 55m, 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?
As of July 2025, there are 6 operators available to choose from 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?
momondo data reveals that the most frequently booked plane model on the route from Boston to St. Louis is Embraer 175, representing 28.02% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 23.38%, Boeing 737 MAX 8 at 14.06%, and Boeing 737-700 Passenger/BBJ1 (winglets) at 10.57%.
What is the most popular airline from Boston to St. Louis?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Boston to St. Louis is American Airlines (56% of total bookings). The next most popular airlines are Southwest (33%), Delta (6%), and Frontier (3%).

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 Airlines	PriceFrom $107	Free Cancellation	Rating 6.3 8,055 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $113	Free Cancellation	Rating 5.9 3,271 reviews	Search Frontier flights
Delta	PriceFrom $196	Free Cancellation	Rating 8.0 7,952 reviews	Search Delta flights
United Airlines	PriceFrom $257	Free Cancellation	Rating 7.4 8,846 reviews	Search United Airlines flights
American Airlines	PriceFrom $289	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $333	Free Cancellation	Rating 8.0 4,250 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 $458, but momondo users have found Southwest deals from Boston to St. Louis from as low as $333 round-trip. Southwest has been scored 8.0/10 in 4,250 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 $289, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $449 round-trip. American Airlines operates 12 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.

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Collinsville

Fenton

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Festus

Glencoe

Clayton

Eureka

Edwardsville

Grafton

Shrewsbury

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.

An easier way to manage your St. Louis trip

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Cheap flights from Boston to St. Louis from $66

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 8/21. 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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Spirit Airlines flights from Boston to St. Louis

Our best Spirit Airlines deals on Boston to St. Louis flight tickets

American Airlines flights from Boston to St. Louis

Our best American Airlines deals on Boston to St. Louis flight tickets

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?

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

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

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?

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 10% 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 July 2025, prices for Boston to St. Louis flights are approximately 12% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Boston Logan Intl to Lambert-St Louis?

Spirit Airlines, American Airlines, and Southwest are the most popular carriers operating from Boston Logan Intl to Lambert-St Louis

What airlines fly to St. Louis?

How many flights depart from Boston to St. Louis on average per day?

As of July 2025, there are 4 flights per day flying from Boston to St. Louis. The most common time of day flights depart is 7:00AM, with 56% of flights taking off at noon.

How many flights depart from Boston to St. Louis on average per week?

32 flights are operational weekly from Boston to St. Louis as of July 2025. The most popular departure day for this route is Tue, with 19% of flights per week taking off on this day.

When to book flights from Boston to St. Louis

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

Fastest flight time

Direct flights

Airports in St. Louis

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

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

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?

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

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

Southwest Flights From Boston to St. Louis

American Airlines Flights From Boston to St. Louis

Traveling to a place near St. Louis?

Why use momondo?

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

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

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

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

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Missouri