Cheap flights from Boston to St. Louis (BOS - STL) from $97

This is the cheapest one-way flight price, found on 6/5. Prices may vary by date and flight preferences.
BOS — STL
Jun 10 — Jun 171

The best prices from Boston Logan Intl to Lambert-St Louis are usually found in January or September, booked 39 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

How to find the cheapest flight from Boston (BOS) to St. Louis (STL)

All the information you need to plan the best BOS to STL flight in 2023: compare Boston to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.

Popular in

December

Cheapest in

January

Round-trip from

$293

One-way from

$158
High demand for flights, 18% potential price rise
Best time to find cheap flights, 12% potential price drop
From Boston Logan Intl to Lambert-St Louis
One-way flight from Boston Logan Intl to Lambert-St Louis

BOS - STL

Price

$293 - $471

STL

Temperature

32 - 80.6 °F

STL

Rainfall

2.2 - 4.7 inches

Cheap flights from Boston to St. Louis in June, July 2023

The best prices found for BOS to STL flights for June, July
Check out some of the best flight deals from Boston to St. Louis in 2023. More deals are always being added, so be sure to check back regularly.

Boston to St. Louis 2023 flight deals

Cheap flights to St. Louis from Boston found for this year
Check out some of the best flight deals from Boston to St. Louis in 2023. More deals are always being added, so be sure to check back regularly.

Cheap Frontier flights from Boston to St. Louis

Consider these cheap Frontier flights we've found departing from Boston to St. Louis. Deals update often to give you more flight options matching your criteria
  • One of the most popular airlines traveling from Boston to St. Louis is Frontier. Flights from Frontier traveling this route typically cost $526.79 RT. This price is typically 35% cheaper than other airlines that offer Boston to St. Louis flights. When booking this route, the cheapest RT price found was $273. Boston Logan Intl Airport is the most common Boston airport to take off from when flying to St. Louis. Lambert-St Louis Airport is the most popular arrival airport in St. Louis. When flying from Boston to St. Louis, Frontier flights are 4% more popular than any other airline flying that same route.

Cheap Spirit Airlines flights from Boston to St. Louis

Browse through some of the cheapest Spirit Airlines flights traveling from Boston to St. Louis. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
  • If you’re traveling from Boston to St. Louis, one of the more common airlines traveling that route is Spirit Airlines. Boston to St. Louis flights are typically 58% cheaper than other airlines traveling the same route. Flights from Spirit Airlines typically cost $418.80 RT. The cheapest Spirit Airlines flight found for this route was $235. When traveling from Boston to St. Louis on Spirit Airlines, the most popular airport to depart from is Boston Logan Intl Airport and the most popular airport to arrive at is Lambert-St Louis Airport. When flying from Boston to St. Louis, Spirit Airlines flights are 1% more popular than any other airline flying that same route.

Non-stop flights to St. Louis from Boston

Save time with Boston to St. Louis direct flight deals
Take a look at some of the direct flights traveling from Boston to St. Louis in the near future. Select from other flights from Boston to St. Louis by using the search form above.

Last minute flights from Boston to St. Louis

Late deals on return flights to St. Louis from Boston, departing today and this week
Have a look at some of the last-minute flights available departing from Boston to St. Louis. Users should examine the flight details to ensure there are no surprises.

One-way flights to St. Louis from Boston

The cheapest one-way flights from Boston to St. Louis
Take a look at some of the one-way flights we've detected from Boston to St. Louis. Users in need of a round-trip flight from Boston to St. Louis instead should update the search form at the top of page.

Find flights from Boston to St. Louis within your budget

Use the slider to find flights from Boston to St. Louis that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$185 - $260

Route

Depart

Return

Price

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 7/11

1 stop15h 44m

Lambert-St Louis

Sat 7/22

1 stop17h 34m

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 7/20

1 stop15h 40m

Lambert-St Louis

Sat 7/22

1 stop17h 34m

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sun 7/9

1 stop16h 04m

Lambert-St Louis

Sat 7/22

1 stop17h 34m

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sun 9/10

1 stop6h 47m

Lambert-St Louis

Wed 9/20

1 stop10h 09m

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 7/10

1 stop25h 32m

Lambert-St Louis

Sat 7/22

1 stop17h 34m

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 6/15

1 stop13h 28m

Lambert-St Louis

Tue 6/20

1 stop16h 26m

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 7/4

1 stop23h 43m

Lambert-St Louis

Tue 7/11

1 stop16h 41m

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 9/8

1 stop25h 56m

Lambert-St Louis

Sun 9/10

1 stop15h 18m

Boston Logan IntlLambert-St Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 8/7

1 stop7h 19m

Lambert-St Louis

Fri 8/18

1 stop14h 51m

Flights are sorted by cheapest first

Deals found on 6/4

Reviews of Airlines Servicing St. Louis

Peruse reviews from past customers who have flown with Frontier, Spirit Airlines and Sun Country Air from Boston to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
2,387 reviews

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.2

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Delta
8.0
Very good
2,387 reviews
Delta
8.0
Very good
2,387 reviews

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.2

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Sun Country Air
7.4
Good
84 reviews
Delta
8.0
Very good
2,387 reviews

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.2

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

American Airlines
7.3
Good
2,149 reviews
Delta
8.0
Very good
2,387 reviews

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.2

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Spirit Airlines
6.5
Okay
1,060 reviews
Delta
8.0
Very good
2,387 reviews

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.2

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Frontier
5.9
Fair
677 reviews
Delta
8.0
Very good
2,387 reviews

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.2

Reviews

1 / 10

Great help with luggage and overhead bin. Seat not what I expected for comfort care. No extra leg room.

Related info for your journey

Useful info, stats and facts about Boston to St. Louis flights.

Alternative routes for Boston to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Boston to St. Louis

The chart below displays the airlines Cheapflights users traveling from Boston to St. Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Spirit AirlinesCheapest$142Average$281FlexibilityNo cancel feeOn-time65%COVID-19 safety
Search Spirit Airlines flights
FrontierCheapest$180Average$234FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
American AirlinesCheapest$235Average$419FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
JetBlueCheapest$273Average$527FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search JetBlue flights
DeltaCheapest$286Average$395FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
United AirlinesCheapest$302Average$377FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
Alaska AirlinesCheapest$366Average$535FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search Alaska Airlines flights

Hourly flight availability from Boston to St. Louis

See what time of day planes typically take off from Boston to St. Louis
1%of flight departuresEarly morningMidnight to 6 am
82%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
17%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Boston to St. Louis

See how many times per day planes take to the skies headed from Boston to St. Louis
Sunday7daily flights
Monday6daily flights
Tuesday6daily flights
Wednesday6daily flights
Thursday6daily flights
Friday6daily flights
Saturday3daily flights
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.