Skip to content

United flights from Saint Louis to Boston starting at

Select journey type

Enter to select travel class and passengers

Book with confidence with United

Low fare calendar for flights from Saint Louis (STL) to Boston (BOS)

Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
1
from
$412 Price subject to changes
Viewed:a day ago
Return:
2
from
$334 Price subject to changes
Viewed:5 hours ago
Return:
3
from
$252 Price subject to changes
Viewed:5 hours ago
Return:
4
from
$242 Price subject to changes
Viewed:5 hours ago
Return:
5
from
$272 Price subject to changes
Viewed:5 hours ago
Return:
6
from
$242 Price subject to changes
Viewed:5 hours ago
Return:
7
from
$242 Price subject to changes
Viewed:5 hours ago
Return:
8
from
$334 Price subject to changes
Viewed:5 hours ago
Return:
9
from
$344 Price subject to changes
Viewed:5 hours ago
Return:
10
from
$232 Price subject to changes
Viewed:5 hours ago
Return:
11
from
$242 Price subject to changes
Viewed:5 hours ago
Return:
12
from
$293 Price subject to changes
Viewed:5 hours ago
Return:
13
from
$232 Price subject to changes
Viewed:5 hours ago
Return:
14
from
$232 Price subject to changes
Viewed:5 hours ago
Return:
15
from
$202 Price subject to changes
Viewed:5 hours ago
Return:
16
from
$212 Price subject to changes
Viewed:5 hours ago
Return:
17
from
$172 Price subject to changes
Viewed:5 hours ago
Return:
18
from
$182 Price subject to changes
Viewed:5 hours ago
Return:
19
from
$172 Price subject to changes
Viewed:5 hours ago
Return:
20
from
$172 Price subject to changes
Viewed:5 hours ago
Return:
21
from
$172 Price subject to changes
Viewed:5 hours ago
Return:
22
from
$182 Price subject to changes
Viewed:5 hours ago
Return:
23
from
$182 Price subject to changes
Viewed:5 hours ago
Return:
24
from
$162 Price subject to changes
Viewed:5 hours ago
Return:
25
from
$183 Price subject to changes
Viewed:5 hours ago
Return:
26
from
$163 Price subject to changes
Viewed:5 hours ago
Return:
27
from
$163 Price subject to changes
Viewed:5 hours ago
Return:
28
from
$163 Price subject to changes
Viewed:5 hours ago
Return:
29
from
$163 Price subject to changes
Viewed:5 hours ago
Return:
30
from
$183 Price subject to changes
Viewed:5 hours ago
Return:
31
from
$163 Price subject to changes
Viewed:5 hours ago
Return:
Lowest PriceToday
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

More United deals on Saint Louis (STL) to Boston (BOS) flights

FromToDatesFare TypePrice

Saint Louis (STL)

Boston (BOS)

Depart: 10/24/20

Return: 10/31/20

Roundtrip
from
$162*
Viewed:4hoursago

Saint Louis (STL)

Boston (BOS)

Depart: 10/26/20

Return: 11/02/20

Roundtrip
from
$163*
Viewed:4hoursago

Saint Louis (STL)

Boston (BOS)

Depart: 10/27/20

Return: 11/03/20

Roundtrip
from
$163*
Viewed:4hoursago

Saint Louis (STL)

Boston (BOS)

Depart: 10/28/20

Return: 11/04/20

Roundtrip
from
$163*
Viewed:4hoursago

Saint Louis (STL)

Boston (BOS)

Depart: 10/29/20

Return: 11/05/20

Roundtrip
from
$163*
Viewed:4hoursago

Saint Louis (STL)

Boston (BOS)

Depart: 10/31/20

Return: 11/07/20

Roundtrip
from
$163*
Viewed:4hoursago

Saint Louis (STL)

Boston (BOS)

Depart: 10/24/20

Return: 11/07/20

Roundtrip
from
$163*
Viewed:4hoursago

Saint Louis (STL)

Boston (BOS)

Depart: 10/26/20

Return: 11/09/20

Roundtrip
from
$163*
Viewed:4hoursago

Saint Louis (STL)

Boston (BOS)

Depart: 10/27/20

Return: 11/10/20

Roundtrip
from
$163*
Viewed:4hoursago

Saint Louis (STL)

Boston (BOS)

Depart: 10/28/20

Return: 11/11/20

Roundtrip
from
$163*
Viewed:4hoursago

*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

Weather in Boston

Thursday few clouds
71°F 10/01/20
Friday overcast clouds
64°F 10/02/20
Saturday scattered clouds
62°F 10/03/20
Sunday light rain
63°F 10/04/20
Monday light rain
58°F 10/05/20
Tuesday sky is clear
63°F 10/06/20
Wednesday light rain
67°F 10/07/20
Powered by: OpenWeatherMap.org