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Get United's best fares today on flights from Boston to Saint Louis from *

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

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$315*
Viewed:6 hours ago
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Return:01/30/20
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$315*
Viewed:6 hours ago
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Return:01/31/20
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$315*
Viewed:6 hours ago
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Return:02/01/20
26
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$315*
Viewed:6 hours ago
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Return:02/02/20
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$315*
Viewed:6 hours ago
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Return:02/03/20
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$315*
Viewed:6 hours ago
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Return:02/04/20
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$189*
Viewed:6 hours ago
day-card-journey-type-option-rt
Return:02/05/20
30
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$189*
Viewed:6 hours ago
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Return:02/06/20
31
from
$189*
Viewed:6 hours ago
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Return:02/07/20
from
$189*
Viewed:6 hours ago
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Return:02/08/20
Lowest PriceToday
*Prices have been available for round trips within the last 48 hours and may not be currently available. 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.

Looking for additional flights from Boston to Saint Louis?

FromToDatesFare TypePrice

Boston (BOS)

Saint Louis (STL)

Depart: 01/29/20

Return: 02/05/20

Roundtrip
from
$189*
Viewed:6hoursago

Boston (BOS)

Saint Louis (STL)

Depart: 02/02/20

Return: 02/09/20

Roundtrip
from
$189*
Viewed:6hoursago

Boston (BOS)

Saint Louis (STL)

Depart: 02/03/20

Return: 02/10/20

Roundtrip
from
$189*
Viewed:6hoursago

Boston (BOS)

Saint Louis (STL)

Depart: 02/07/20

Return: 02/14/20

Roundtrip
from
$189*
Viewed:6hoursago

Boston (BOS)

Saint Louis (STL)

Depart: 02/06/20

Return: 02/13/20

Roundtrip
from
$189*
Viewed:6hoursago

Boston (BOS)

Saint Louis (STL)

Depart: 02/12/20

Return: 02/19/20

Roundtrip
from
$189*
Viewed:6hoursago

Boston (BOS)

Saint Louis (STL)

Depart: 02/19/20

Return: 02/26/20

Roundtrip
from
$189*
Viewed:6hoursago

Boston (BOS)

Saint Louis (STL)

Depart: 02/13/20

Return: 02/20/20

Roundtrip
from
$189*
Viewed:6hoursago

Boston (BOS)

Saint Louis (STL)

Depart: 02/20/20

Return: 02/27/20

Roundtrip
from
$189*
Viewed:6hoursago

Boston (BOS)

Saint Louis (STL)

Depart: 02/21/20

Return: 02/28/20

Roundtrip
from
$189*
Viewed:6hoursago

*Prices have been available for round trips within the last 48 hours and may not be currently available. 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 Saint Louis

Wednesday overcast clouds
32°F 01/22/20
Thursday heavy intensity rain
37°F 01/23/20
Friday moderate rain
36°F 01/24/20
Saturday overcast clouds
41°F 01/25/20
Sunday light rain
36°F 01/26/20
Monday broken clouds
46°F 01/27/20
Tuesday overcast clouds
47°F 01/28/20
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