What is the most punctual flight time for Boston to St. Louis flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What’s the cheapest layover airport for flights from Boston to St. Louis?

Fort Lauderdale (FLL) is the most affordable 1-stop option, with an average round-trip price of $245.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airport typically offers the quickest layover for flights from Boston to St. Louis?

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 7h 05m.

Which airline has the best punctuality record on Boston to St. Louis flights?

Over the last year, American Airlines have had the lowest number of delays on this route, with just 12% of flights being delayed.

What’s the top layover airport for flights from Boston to St. Louis?

Chicago (ORD) – chosen by Cheapflights users on 67% of 1-stop itineraries from Boston to St. Louis on Cheapflights.

What’s the fastest layover option from Boston to St. Louis?

Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 12h 30m.

How often are flights from Boston to St. Louis delayed?

About 17% of weekly flights between Boston and St. Louis have experienced delays in the past year, with the average delay time being 141 minutes.

How popular is this Boston to St. Louis flight route?

Flights from Boston Logan Intl to Lambert-St Louis have been viewed 53 times in the past calendar month.

How long is the flight from Boston to St. Louis?

Airlines like United Airlines and Southwest fly from Boston to St. Louis in about 10h 30m. The time it takes to get you to your destination can typically vary by up to 2h 58m. The distance between Boston and St. Louis is about 1043 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from Boston to St. Louis round-trip?

Cheapflights users have booked flights from Boston to St. Louis round-trip from $63. Other airlines that can offer you cheap pricing are Frontier, from $90, and Delta, from $161. Spirit Airlines is priced at 85% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Boston to St. Louis one-way?

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $65. However, be on the lookout for offers from Spirit Airlines and Delta, as they are both options that can get you from Boston to St. Louis for a low price.

Weekly flight availability from Boston to St. Louis

The most flights from BOS to STL are scheduled on a Monday (5 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What are the cheapest flights from Boston to St. Louis?

Looking at all options, your cheapest flight can be booked for $105. While the most popular route (Boston Logan Intl - Lambert-St Louis) can be booked for $140 on average, our data indicates $357 when flying from Boston to St. Louis.

What are the most reliable airlines from Boston to St. Louis?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to St. Louis on time: Iberia (100%), Republic Airways (100%), American Airlines (81%).

What are the most popular airlines that fly from Boston to St. Louis?

Consider American Airlines, Southwest or Delta when booking your flight. These represent the most popular airlines when flying from Boston to St. Louis.

Most accurate provider : When it comes to deals on Boston-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Boston-St. Louis flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Boston-St. Louis flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airports do I use to fly from Boston to St. Louis?

If you wish to fly to St. Louis from Boston, then you need to book flights from Boston Logan Intl to Lambert-St Louis. There are 4 flights from Logan Intl (BOS) to Lambert-St Louis (STL) per day to choose from. Flights to St. Louis from Logan Intl are available from 6 different airlines, which means you should have some options if you want to compare airfare deals. 2h 55m is how long a nonstop flight from Boston to Lambert-St Louis typically takes.

Can I find deals for flights from Boston to St. Louis that include hotel bookings?

Yes. In addition to deals on Boston to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Boston to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to St. Louis.

Can I find deals for business class flights from Boston to St. Louis?

Yes. Cheapflights offers flight deals from Boston to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$68+ Flights from Boston to St. Louis

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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Cheapflights Tip: The best prices from Boston Logan Intl to Lambert-St Louis are usually found in August or January, booked 47 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Boston to St. Louis

Cheapest flights from Boston to St. Louis
Explore the most affordable flight options available from Boston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on décembre 4, 2025.

mer. 12/108:11 pmBOS - STL

1 stop27h 22mMultiple Airlines

sam. 12/133:30 pmSTL - BOS

1 stop16h 57mMultiple Airlines

Deal found 12/4

$338

jeu. 12/1812:22 pmBOS - STL

1 stop11h 11mFrontier

dim. 1/410:57 amSTL - BOS

1 stop21h 45mFrontier

Deal found 12/3

$340

jeu. 12/115:45 amBOS - STL

2 stops17h 48mMultiple Airlines

dim. 12/149:54 amSTL - BOS

1 stop23h 09mMultiple Airlines

Deal found 12/4

$341

lun. 12/1512:02 pmBOS - STL

Nonstop3h 22mAmerican Airlines

lun. 12/154:49 pmSTL - BOS

1 stop6h 24mAmerican Airlines

Deal found 12/4

$344

mer. 12/316:01 amBOS - STL

1 stop11h 26mUnited Airlines

mer. 1/73:11 pmSTL - BOS

2 stops7h 38mUnited Airlines

Deal found 12/2

$346

jeu. 12/1812:03 pmBOS - STL

Nonstop3h 17mAmerican Airlines

mar. 1/1311:05 amSTL - BOS

1 stop8h 40mAmerican Airlines

Deal found 12/4

$361

mer. 12/3111:55 amBOS - STL

1 stop24h 01mMultiple Airlines

dim. 1/410:57 amSTL - BOS

1 stop21h 45mMultiple Airlines

Deal found 12/4

$365

jeu. 12/2512:22 pmBOS - STL

1 stop11h 11mMultiple Airlines

mar. 12/3011:51 amSTL - BOS

1 stop11h 06mMultiple Airlines

Deal found 12/2

$386

lun. 12/88:11 pmBOS - STL

2 stops39h 03mMultiple Airlines

jeu. 12/113:30 pmSTL - BOS

1 stop17h 27mMultiple Airlines

Deal found 12/4

$392

Best flights from Boston to St. Louis
Discover carefully curated flight deals from Boston to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated décembre 4, 2025.

jeu. 1/810:30 amBOS - STL

1 stop13h 28mUnited Airlines

lun. 1/123:11 pmSTL - BOS

2 stops7h 38mUnited Airlines

Deal found 12/3

$332

dim. 1/115:50 amBOS - STL

2 stops10h 30mSouthwest

mar. 1/1311:35 amSTL - BOS

2 stops9h 30mSouthwest

Deal found 12/3

$346

lun. 1/57:00 amBOS - STL

Nonstop3h 31mAmerican Airlines

lun. 1/126:00 amSTL - BOS

1 stop8h 33mAmerican Airlines

Deal found 12/4

$355

mer. 12/316:01 amBOS - STL

1 stop11h 26mUnited Airlines

mer. 1/73:11 pmSTL - BOS

2 stops7h 38mUnited Airlines

Deal found 12/2

$346

ven. 1/93:20 pmBOS - STL

2 stops7h 35mSouthwest

mer. 1/1411:35 amSTL - BOS

2 stops9h 10mSouthwest

Deal found 12/2

$346

jeu. 1/83:20 pmBOS - STL

2 stops6h 40mSouthwest

lun. 1/122:15 pmSTL - BOS

2 stops6h 50mSouthwest

Deal found 12/4

$348

ven. 2/66:00 amBOS - STL

2 stops9h 30mUnited Airlines

mar. 2/109:57 amSTL - BOS

2 stops7h 35mUnited Airlines

Deal found 12/4

$363

ven. 4/1011:41 amBOS - STL

Nonstop3h 08mAmerican Airlines

lun. 4/132:19 pmSTL - BOS

Nonstop2h 43mAmerican Airlines

Deal found 12/4

$441

lun. 1/57:44 pmBOS - STL

1 stop17h 53mUnited Airlines

ven. 1/99:57 amSTL - BOS

2 stops10h 55mUnited Airlines

Deal found 12/3

$403

lun. 4/1311:35 amBOS - STL

Nonstop2h 55mSouthwest

ven. 4/172:30 pmSTL - BOS

Nonstop2h 35mSouthwest

Deal found 12/3

$441

mer. 3/45:50 amBOS - STL

2 stops7h 55mSouthwest

dim. 3/810:15 amSTL - BOS

2 stops9h 45mSouthwest

Deal found 12/3

$449

Last-minute flights from Boston to St. Louis
Discover last-minute flight deals from Boston to St. Louis. Data last updated décembre 4, 2025 and is based on user searches.

mer. 12/108:11 pmBOS - STL

1 stop27h 22mMultiple Airlines

sam. 12/133:30 pmSTL - BOS

1 stop16h 57mMultiple Airlines

Deal found 12/4

$338

jeu. 12/115:45 amBOS - STL

2 stops17h 48mMultiple Airlines

dim. 12/149:54 amSTL - BOS

1 stop23h 09mMultiple Airlines

Deal found 12/4

$341

lun. 12/1512:02 pmBOS - STL

Nonstop3h 22mAmerican Airlines

lun. 12/154:49 pmSTL - BOS

1 stop6h 24mAmerican Airlines

Deal found 12/4

$344

mer. 12/316:01 amBOS - STL

1 stop11h 26mUnited Airlines

mer. 1/73:11 pmSTL - BOS

2 stops7h 38mUnited Airlines

Deal found 12/2

$346

jeu. 1/112:03 pmBOS - STL

Nonstop3h 17mAmerican Airlines

mer. 1/72:54 pmSTL - BOS

Nonstop2h 37mAmerican Airlines

Deal found 12/3

$343

ven. 1/210:56 amBOS - STL

1 stop12h 37mMultiple Airlines

ven. 1/93:43 pmSTL - BOS

2 stops21h 55mMultiple Airlines

Deal found 12/3

$334

ven. 1/27:00 amBOS - STL

Nonstop3h 31mAmerican Airlines

ven. 1/96:00 amSTL - BOS

1 stop8h 17mAmerican Airlines

Deal found 12/4

$342

lun. 1/56:50 amBOS - STL

Nonstop3h 05mSouthwest

lun. 1/125:55 pmSTL - BOS

Nonstop2h 30mSouthwest

Deal found 12/4

$347

jeu. 1/810:30 amBOS - STL

1 stop13h 28mUnited Airlines

lun. 1/123:11 pmSTL - BOS

2 stops7h 38mUnited Airlines

Deal found 12/3

$332

jeu. 1/89:55 amBOS - STL

2 stops8h 35mSouthwest

lun. 1/126:05 amSTL - BOS

2 stops9h 05mSouthwest

Deal found 12/4

$348

ven. 1/236:00 amBOS - STL

1 stop9h 30mUnited Airlines

lun. 1/266:30 amSTL - BOS

2 stops7h 45mUnited Airlines

Deal found 12/3

$340

sam. 1/3110:30 amBOS - STL

2 stops9h 57mUnited Airlines

mar. 2/33:11 pmSTL - BOS

2 stops7h 38mUnited Airlines

Deal found 12/4

$331

One-way flights from Boston to St. Louis
Search for one-way flight options from Boston to St. Louis. Find affordable one-way fares based on user searches. Data last updated décembre 4, 2025.

mar. 2/36:00 amBOS - STL

1 stop25h 51mFrontier

Deal found 12/3

$68

mer. 2/43:43 pmBOS - STL

1 stop8h 50mMultiple Airlines

Deal found 12/3

$75

ven. 2/2711:06 amBOS - STL

1 stop12h 27mFrontier

Deal found 12/3

$79

mer. 12/108:11 pmBOS - STL

1 stop27h 22mMultiple Airlines

Deal found 12/3

$83

jeu. 2/53:43 pmBOS - STL

1 stop8h 50mMultiple Airlines

Deal found 12/3

$89

sam. 2/286:30 amBOS - STL

1 stop9h 15mAmerican Airlines

Deal found 12/3

$91

lun. 2/23:43 pmBOS - STL

1 stop8h 50mMultiple Airlines

Deal found 12/3

$93

mar. 3/33:00 pmBOS - STL

Nonstop3h 27mAmerican Airlines

Deal found 12/3

$95

jeu. 1/811:06 amBOS - STL

1 stop12h 27mFrontier

Deal found 12/4

$97

mer. 3/46:00 amBOS - STL

1 stop28h 47mFrontier

Deal found 12/3

$99

Find flight deals from Boston to St. Louis

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$332 (United Airlines)
One-way from	$68 (Kiwi.com)
Popular in	April
Cheapest in	August
Average price	$447
Good round-trip deal	$378 or less
Good one-way deal	$184 or less

Provider with most accurate pricing for Boston Logan Intl-Lambert-St Louis flight deals.

Search Deals

Provider most trusted by Cheapflights users for Boston Logan Intl-Lambert-St Louis flights.

Search Deals

From Boston Logan Intl to Lambert-St Louis

Search Deals

One-way flight from Boston Logan Intl to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($36 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Price to beat on a round-trip flight from Boston Logan Intl to Lambert-St Louis.

Search Deals

Price to beat on a one-way flight from Boston Logan Intl to Lambert-St Louis.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

jeu. 1/8

10:30 am-10:58 pm

1 stop13h 28m

Lambert-St Louis

lun. 1/12

3:11 pm-11:49 pm

2 stops7h 38m

$332

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

dim. 1/11

5:50 am-3:20 pm

2 stops10h 30m

Lambert-St Louis

mar. 1/13

11:35 am-10:05 pm

2 stops9h 30m

$346

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

mer. 12/31

6:01 am-4:27 pm

1 stop11h 26m

Lambert-St Louis

mer. 1/7

3:11 pm-11:49 pm

2 stops7h 38m

$346

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

ven. 1/9

3:20 pm-9:55 pm

2 stops7h 35m

Lambert-St Louis

mer. 1/14

11:35 am-9:45 pm

2 stops9h 10m

$346

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

jeu. 1/8

3:20 pm-9:00 pm

2 stops6h 40m

Lambert-St Louis

lun. 1/12

2:15 pm-10:05 pm

2 stops6h 50m

$348

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

lun. 1/5

7:00 am-9:31 am

Nonstop3h 31m

Lambert-St Louis

lun. 1/12

6:00 am-3:33 pm

1 stop8h 33m

$355

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

ven. 2/6

6:00 am-2:30 pm

2 stops9h 30m

Lambert-St Louis

mar. 2/10

9:57 am-6:32 pm

2 stops7h 35m

$363

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

lun. 1/5

7:44 pm-12:37 pm

1 stop17h 53m

Lambert-St Louis

ven. 1/9

9:57 am-9:52 pm

2 stops10h 55m

$403

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

ven. 4/10

11:41 am-1:49 pm

Nonstop3h 08m

Lambert-St Louis

lun. 4/13

2:19 pm-6:02 pm

Nonstop2h 43m

$441

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

lun. 4/13

11:35 am-1:30 pm

Nonstop2h 55m

Lambert-St Louis

ven. 4/17

2:30 pm-6:05 pm

Nonstop2h 35m

$441

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 21 results

Compare providers for flights from Boston to St. Louis

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to St. Louis in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
JustAirTicket	Price Accuracy-	Trust Score*1 star
Priceline	Price Accuracy1 star	Trust Score*3 stars
CheapTicketsDeal	Price Accuracy3 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Boston-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Boston-St. Louis flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Boston-St. Louis flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Boston with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to St. Louis

Prices

Airlines

Delays

How far ahead should I book a flight from Boston to St. Louis?

To ensure you get the cheapest price possible for a flight from Boston to St. Louis, you should look to book at least 47 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Boston to St. Louis?

Currently, December is the cheapest month in which you can book a flight from Boston to St. Louis (average of $107). Flying from Boston to St. Louis in July is currently the most expensive (average of $300). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to STL?

It’s typically best to fly out from Boston to St. Louis in the evening. Doing so could potentially save you 4% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Boston to St. Louis?

Travelers seeking maximum savings on their Boston to St. Louis flight should consider departing on Monday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for Boston to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Boston to St. Louis trip

Airports

BOS

Use the FlyLogan App to pre-order food and save time at BOS. Most restaurants participate, making it a convenient option.

STL

Take the MetroLink light rail from STL to downtown St. Louis. It's affordable and takes about 40 minutes, ideal for light luggage.

Our travel experts

Paul Rubio

Expert on BOS

Taryn White

Expert on STL

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Boston to St. Louis, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

8.0

Very good

4,250 reviews

Southwest

8.0

Very good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Delta

7.9

Good

8,011 reviews

Southwest

8.0

Very good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,047 reviews

Southwest

8.0

Very good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Spirit Airlines

6.3

Okay

8,157 reviews

Southwest

8.0

Very good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Frontier

5.8

Fair

3,091 reviews

Southwest

8.0

Very good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

What airports do I use to fly from Boston to St. Louis?
If you wish to fly to St. Louis from Boston, then you need to book flights from Boston Logan Intl to Lambert-St Louis. There are 4 flights from Logan Intl (BOS) to Lambert-St Louis (STL) per day to choose from. Flights to St. Louis from Logan Intl are available from 6 different airlines, which means you should have some options if you want to compare airfare deals. 2h 55m is how long a nonstop flight from Boston to Lambert-St Louis typically takes.
How popular is this Boston to St. Louis flight route?
Flights from Boston Logan Intl to Lambert-St Louis have been viewed 53 times in the past calendar month.
How long is the flight from Boston to St. Louis?
Airlines like United Airlines and Southwest fly from Boston to St. Louis in about 10h 30m. The time it takes to get you to your destination can typically vary by up to 2h 58m. The distance between Boston and St. Louis is about 1043 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from Boston to St. Louis round-trip?
Cheapflights users have booked flights from Boston to St. Louis round-trip from $63. Other airlines that can offer you cheap pricing are Frontier, from $90, and Delta, from $161. Spirit Airlines is priced at 85% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Boston to St. Louis one-way?
The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $65. However, be on the lookout for offers from Spirit Airlines and Delta, as they are both options that can get you from Boston to St. Louis for a low price.
What are the most reliable airlines from Boston to St. Louis?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to St. Louis on time: Iberia (100%), Republic Airways (100%), American Airlines (81%).
What are the cheapest flights from Boston to St. Louis?
Looking at all options, your cheapest flight can be booked for $105. While the most popular route (Boston Logan Intl - Lambert-St Louis) can be booked for $140 on average, our data indicates $357 when flying from Boston to St. Louis.
Can I find deals for flights from Boston to St. Louis that include hotel bookings?
Yes. In addition to deals on Boston to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Boston to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to St. Louis.
Can I find deals for business class flights from Boston to St. Louis?
Yes. Cheapflights offers flight deals from Boston to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Boston to St. Louis?
Currently, December is the cheapest month in which you can book a flight from Boston to St. Louis (average of $107). Flying from Boston to St. Louis in July is currently the most expensive (average of $300). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Other flights to St. Louis

Top 6 airlines flying from Boston to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$83	Average$147	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$90	Average$283	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$216	Average$317	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$292	Average$406	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$297	Average$453	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$322	Average$469	FlexibilityNo cancel fee	On-time63%

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$68+ Cheap flights from Boston to St. Louis (BOS - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Boston Logan Intl to Lambert-St Louis are usually found in August or January, booked 47 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Boston to St. Louis

Cheapest flights from Boston to St. LouisExplore the most affordable flight options available from Boston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on décembre 4, 2025.

Explore the most affordable flight options available from Boston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on décembre 4, 2025.

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Everything you need to know about your flight from Boston to St. Louis

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Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Boston to St. Louis, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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Top 6 airlines flying from Boston to St. Louis

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Cheapest flights from Boston to St. Louis
Explore the most affordable flight options available from Boston to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on décembre 4, 2025.