How does KAYAK find such low prices on flights from Massachusetts to St. Louis?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Massachusetts to St. Louis.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Massachusetts to St. Louis?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Massachusetts is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Massachusetts to St. Louis?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Massachusetts with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Massachusetts to St. Louis?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Massachusetts up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$104 CHEAP FLIGHTS from Massachusetts to St. Louis

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Flight Deals

Cheap Flights from Massachusetts to St. Louis

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Massachusetts to St. Louis

Tue, Nov 17 - Wed, Nov 18

7:00 am - 9:16 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 16mnonstop

9:50 am - 1:26 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 36mnonstop

$331American Airlines

Thu, Dec 3 - Thu, Dec 3

7:00 am - 9:29 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 29mnonstop

6:20 pm - 9:57 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 37mnonstop

$331American Airlines

Wed, Dec 2 - Thu, Dec 3

5:20 am - 7:30 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

10:15 am - 1:45 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$331Southwest

Wed, Nov 18 - Thu, Nov 19

5:05 pm - 7:15 pmBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

1:20 pm - 4:50 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$331Southwest

Fri, Jan 15 - Mon, Jan 18

10:24 am - 12:04 amBOS Boston Logan Intl-STL Lambert-St Louis

14h 40m1 stop Orlando

5:59 pm - 9:29 amSTL Lambert-St Louis-BOS Boston Logan Intl

14h 30m1 stop Orlando

$333Frontier

Tue, Nov 17 - Thu, Nov 19

4:00 pm - 8:30 pmORH Worcester-STL Lambert-St Louis

5h 30m1 stop New York LaGuardia

7:00 am - 3:19 pmSTL Lambert-St Louis-ORH Worcester

7h 19m1 stop New York LaGuardia

$346Delta

Thu, Nov 12 - Mon, Nov 16

12:39 pm - 5:42 pmBOS Boston Logan Intl-STL Lambert-St Louis

30h 03m1 stop Atlanta Hartsfield-Jackson

6:34 pm - 11:30 amSTL Lambert-St Louis-BOS Boston Logan Intl

15h 56m1 stop Atlanta Hartsfield-Jackson

$347Frontier

Thu, Nov 12 - Mon, Nov 16

12:34 pm - 5:42 pmBOS Boston Logan Intl-STL Lambert-St Louis

30h 08m2 stops Fort Lauderdale Atlanta Hartsfield-Jackson

6:34 pm - 11:30 amSTL Lambert-St Louis-BOS Boston Logan Intl

15h 56m1 stop Atlanta Hartsfield-Jackson

$353Multiple Airlines

Tue, Nov 17 - Thu, Nov 19

4:00 pm - 11:56 pmORH Worcester-STL Lambert-St Louis

8h 56m2 stops New York LaGuardia Atlanta Hartsfield-Jackson

7:00 am - 3:19 pmSTL Lambert-St Louis-ORH Worcester

7h 19m1 stop New York LaGuardia

$356Delta

Fri, Nov 13 - Mon, Nov 16

12:11 pm - 7:14 pmBOS Boston Logan Intl-STL Lambert-St Louis

32h 03m2 stops Des Moines Denver Intl

6:34 pm - 11:30 amSTL Lambert-St Louis-BOS Boston Logan Intl

15h 56m1 stop Atlanta Hartsfield-Jackson

$356Multiple Airlines

Recent last minute flight deals from Massachusetts to St. Louis

Tue, Nov 3 - Wed, Nov 4

7:00 am - 9:16 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 16mnonstop

9:50 am - 1:26 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 36mnonstop

$621American Airlines

Tue, Nov 3 - Sat, Nov 7

3:25 pm - 5:47 pmBOS Boston Logan Intl-STL Lambert-St Louis

3h 22mnonstop

1:10 pm - 4:49 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 39mnonstop

$621American Airlines

Tue, Nov 3 - Tue, Nov 3

5:20 am - 7:30 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

6:10 pm - 9:40 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$621Southwest

Sat, Oct 31 - Tue, Nov 3

7:15 am - 9:29 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 14mnonstop

6:20 pm - 9:58 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 38mnonstop

$621American Airlines

Tue, Nov 3 - Wed, Nov 4

1:20 pm - 6:05 pmBOS Boston Logan Intl-STL Lambert-St Louis

5h 45m1 stop Baltimore/Washington

1:20 pm - 4:50 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$631Southwest

Tue, Nov 3 - Fri, Nov 6

5:30 am - 10:51 amBOS Boston Logan Intl-STL Lambert-St Louis

6h 21m1 stop Atlanta Hartsfield-Jackson

6:00 am - 2:54 pmSTL Lambert-St Louis-BOS Boston Logan Intl

7h 54m1 stop Atlanta Hartsfield-Jackson

$690Delta

Fri, Oct 30 - Sat, Oct 31

1:57 pm - 9:12 pmBOS Boston Logan Intl-STL Lambert-St Louis

8h 15m1 stop Atlanta Hartsfield-Jackson

6:00 am - 12:42 pmSTL Lambert-St Louis-BOS Boston Logan Intl

5h 42m1 stop Atlanta Hartsfield-Jackson

$690Delta

Mon, Nov 2 - Tue, Nov 3

7:31 am - 12:10 pmBOS Boston Logan Intl-STL Lambert-St Louis

5h 39m1 stop Chicago O'Hare Intl

9:59 am - 3:50 pmSTL Lambert-St Louis-BOS Boston Logan Intl

4h 51m1 stop Newark

$690United Airlines

Mon, Nov 2 - Tue, Nov 3

3:01 pm - 7:23 pmBOS Boston Logan Intl-STL Lambert-St Louis

5h 22m1 stop Chicago O'Hare Intl

1:08 pm - 7:14 pmSTL Lambert-St Louis-BOS Boston Logan Intl

5h 06m1 stop Chicago O'Hare Intl

$690United Airlines

Sun, Nov 1 - Sun, Nov 8

12:39 pm - 7:14 pmBOS Boston Logan Intl-STL Lambert-St Louis

31h 35m2 stops Atlanta Hartsfield-Jackson Denver Intl

12:14 pm - 11:44 amSTL Lambert-St Louis-BOS Boston Logan Intl

22h 30m2 stops Dallas/Fort Worth Atlanta Hartsfield-Jackson

$810Frontier

Recent direct flight deals from Massachusetts to St. Louis

Tue, Nov 17 - Wed, Nov 18

7:00 am - 9:16 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 16mnonstop

9:50 am - 1:26 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 36mnonstop

$331American Airlines

Thu, Dec 3 - Thu, Dec 3

7:00 am - 9:29 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 29mnonstop

6:20 pm - 9:57 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 37mnonstop

$331American Airlines

Wed, Dec 2 - Thu, Dec 3

5:20 am - 7:30 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

10:15 am - 1:45 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$331Southwest

Wed, Nov 18 - Thu, Nov 19

5:05 pm - 7:15 pmBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

1:20 pm - 4:50 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$331Southwest

Tue, Dec 1 - Wed, Dec 2

7:00 am - 9:26 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 26mnonstop

6:20 pm - 9:57 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 37mnonstop

$331American Airlines

Thu, Nov 19 - Mon, Nov 23

5:20 am - 7:30 amBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

10:15 am - 1:45 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$331Southwest

Thu, Dec 10 - Tue, Dec 15

1:10 pm - 3:20 pmBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

6:10 pm - 9:45 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 35mnonstop

$331Southwest

Wed, Dec 9 - Sat, Dec 12

5:05 pm - 7:15 pmBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

10:50 am - 2:20 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$331Southwest

Tue, Nov 17 - Thu, Nov 19

5:05 pm - 7:15 pmBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

1:20 pm - 4:50 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$331Southwest

Wed, Dec 2 - Sat, Dec 5

5:05 pm - 7:15 pmBOS Boston Logan Intl-STL Lambert-St Louis

3h 10mnonstop

10:50 am - 2:20 pmSTL Lambert-St Louis-BOS Boston Logan Intl

2h 30mnonstop

$331Southwest

Useful Info

Low season	January
High season	July
Cheapest flight	$104

Best time to beat the crowds with an average 9% drop in price.

Most popular time to fly with an average 5% increase in price.

Flight from Boston to St. Louis

How does KAYAK find such low prices on flights from Massachusetts to St. Louis?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Massachusetts to St. Louis.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Massachusetts to St. Louis?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Massachusetts is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Massachusetts to St. Louis?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Massachusetts with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Massachusetts to St. Louis?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Massachusetts up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.