Flights from Boston to Saint Louis

Flights tailored to your budget

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Cheap Boston - Saint Louis flight offers

Find cheap flight tickets and last-minute flight deals from Boston to Saint Louis

Frontier Airlines
Sun, 09/13 (BOS) Boston -> (STL) Saint Louis
Direct
Frontier Airlines
Thu, 09/17 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $39
Frontier Airlines
Sun, 09/13 (BOS) Boston -> (STL) Saint Louis
Direct
Frontier Airlines
Fri, 09/18 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $39
Frontier Airlines
Sun, 09/13 (BOS) Boston -> (STL) Saint Louis
Direct
Frontier Airlines
Wed, 09/16 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $86
Southwest Airlines
Tue, 09/15 (BOS) Boston -> (STL) Saint Louis
Direct
Southwest Airlines
Fri, 09/18 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $90
United
Mon, 09/14 (BOS) Boston -> (STL) Saint Louis
Direct
United
Thu, 09/17 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $96
United
Mon, 09/14 (BOS) Boston -> (STL) Saint Louis
Direct
United
Fri, 09/18 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $96
Southwest Airlines
Fri, 09/18 (BOS) Boston -> (STL) Saint Louis
Direct
Southwest Airlines
Sun, 09/20 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 11 days ago
from $96
Southwest Airlines
Fri, 10/09 (BOS) Boston -> (STL) Saint Louis
Direct
Southwest Airlines
Tue, 10/13 (STL) Saint Louis -> (BOS) Boston
Direct
Price found Yesterday
from $99
Frontier Airlines
Sun, 09/13 (BOS) Boston -> (STL) Saint Louis
Direct
Frontier Airlines
Thu, 09/17 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $39
Frontier Airlines
Sun, 09/13 (BOS) Boston -> (STL) Saint Louis
Direct
Frontier Airlines
Fri, 09/18 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $39
Frontier Airlines
Sun, 09/13 (BOS) Boston -> (STL) Saint Louis
Direct
Frontier Airlines
Wed, 09/16 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $86
Southwest Airlines
Tue, 09/15 (BOS) Boston -> (STL) Saint Louis
Direct
Southwest Airlines
Fri, 09/18 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $90
United
Mon, 09/14 (BOS) Boston -> (STL) Saint Louis
Direct
United
Thu, 09/17 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $96
United
Mon, 09/14 (BOS) Boston -> (STL) Saint Louis
Direct
United
Fri, 09/18 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 2 days ago
from $96
Southwest Airlines
Fri, 09/18 (BOS) Boston -> (STL) Saint Louis
Direct
Southwest Airlines
Sun, 09/20 (STL) Saint Louis -> (BOS) Boston
Direct
Price found 11 days ago
from $96
Southwest Airlines
Fri, 10/09 (BOS) Boston -> (STL) Saint Louis
Direct
Southwest Airlines
Tue, 10/13 (STL) Saint Louis -> (BOS) Boston
Direct
Price found Yesterday
from $99

Info about flights from Boston to Saint Louis

Some useful info about flights from Boston to Saint Louis to help you plan your next trip

Best price last 15 days $39
Average flight duration 2h 59m
Cheapest month September
Average number of flights per week 4
First flight time 01:50
Last flight time 19:50

When is it best to fly from Boston to Saint Louis

Find out what is the best time of year to fly from Boston to Saint Louis

Sep $62
Oct $99
Nov $172
Dec $114
Jan $107
Feb $109
Mar $176
Apr $219
May $117
Jun $156
Jul $102
Aug $168
Most expensive month April
Average price $219
Cheapest month September
Average price $62
How do we get the info you see here? Please note that we offer an online comparison service and that all information and prices regarding services and/or products available on our website are provided by our third-party partners. We do our best to show you up-to-date information, but please note that we are not responsible for the completeness or accuracy of the information published, so please check all conditions carefully on the website of the partner before making a booking. Please check our Terms and Conditions for more details. Read more

Top airlines on the route Boston - Saint Louis

Airlines providing flights to Saint Louis from Boston

American Airlines
American Airlines
DELTA
DELTA
Frontier Airlines
Frontier Airlines
United
United

How much should you expect to spend for a flight from Boston to Saint Louis?

Flight prices from Boston to Saint Louis change depending on demand and time of booking.

$39 is the lowest fare found in the past 15 days.

Studies show that flying midweek — like on a Tuesday or Wednesday — can be cheaper than weekend flights. Still, airfares change frequently, so check updated prices on Jetcost.

Which departure and arrival airports are available?

Between Boston and Saint Louis, flight options may depend on the combination of airports available.

  • Airports in Boston: Only Boston - Logan is currently in operation.
  • Airports in Saint Louis: Saint Louis - Lambert is the only active airport in the area.

Sometimes flying into a nearby city can be more cost-effective. When a city has multiple airports, it’s worth comparing different flight combinations.

Flights from Boston - Logan to Saint Louis - Lambert

Plan your journey from Boston to Saint Louis with ease

Use Jetcost to tailor your search — direct or connecting flights, round-trip or one-way, filtered by airline, price, travel time, or agency.

Other popular destinations

Exploring options in United States? These cities are trending: Boston, Los Angeles, Miami, New York City, Orlando.

Flight availability can change quickly — refresh the results if you’ve been away from the page for a while.
Frequently Asked Questions

Frequently asked questions about flights from Boston to Saint Louis.

How much does an airline ticket from Boston to Saint Louis cost?

The lowest price recorded in the last 15 days for a flight from Boston to Saint Louis is $39.

How far is Boston from Saint Louis?

Boston is about 1044 mi from Saint Louis.

What are the airports in Saint Louis?

Saint Louis has one airport: Saint Louis - Lambert.

What are the airports in Boston?

Boston has one airport: Boston - Logan.

What are the most popular cities in United States?

The most popular cities in United States according to our users' searches are: Boston, Los Angeles, Miami, New York City, Orlando.

When should I book a flight from Boston to Saint Louis?

The best time to book a flight from Boston to Saint Louis is 1 month in advance, while the worst time is 34 weeks in advance.

What is the cheapest month to fly from Boston to Saint Louis?

The cheapest month to fly from Boston to Saint Louis is September.

What is the most expensive month to fly from Boston to Saint Louis?

The most expensive month to fly from Boston to Saint Louis is April.

What is the best day of the week to fly from Boston to Saint Louis?

For flights from Boston to Saint Louis Friday is on average the cheapest day to fly, while Thursday is the most expensive day to fly.