Book United Boston to St. Louis flight deals from $342

Search flights from Boston to St. Louis (BOS - STL)

July

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Friday 13th

Return Saturday 28th
from$ 344*Viewed: 39 minutes ago

Tuesday 24th

Return Wednesday 8th
from$ 344*Viewed: 39 minutes ago

Thursday 26th

Return Friday 10th
from$ 344*Viewed: 39 minutes ago

August

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Monday 27th

Return Tuesday 11th
from$ 342*Viewed: 38 minutes ago

Tuesday 28th

Return Wednesday 12th
from$ 342*Viewed: 38 minutes ago

Wednesday 29th

Return Thursday 13th
from$ 342*Viewed: 38 minutes ago

September

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Wednesday 5th

Return Thursday 20th
from$ 342*Viewed: 38 minutes ago

Tuesday 11th

Return Wednesday 26th
from$ 342*Viewed: 38 minutes ago

Wednesday 12th

Return Thursday 27th
from$ 342*Viewed: 38 minutes ago
**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..
A view of the St. Louis Arch

Plan ahead for flights from Boston to St. Louis

from
to
Type
Dates
Price*
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Tue 14 Aug 2018
Return Wed 29 Aug 2018
from$ 342*Viewed: 39 minutes ago
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Wed 15 Aug 2018
Return Thu 30 Aug 2018
from$ 342*Viewed: 39 minutes ago
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Tue 21 Aug 2018
Return Wed 5 Sep 2018
from$ 342*Viewed: 38 minutes ago
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Wed 22 Aug 2018
Return Thu 6 Sep 2018
from$ 342*Viewed: 38 minutes ago
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Mon 27 Aug 2018
Return Tue 11 Sep 2018
from$ 342*Viewed: 38 minutes ago
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Tue 28 Aug 2018
Return Wed 12 Sep 2018
from$ 342*Viewed: 38 minutes ago
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Wed 29 Aug 2018
Return Thu 13 Sep 2018
from$ 342*Viewed: 38 minutes ago
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Tue 4 Sep 2018
Return Wed 19 Sep 2018
from$ 342*Viewed: 38 minutes ago
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Wed 5 Sep 2018
Return Thu 20 Sep 2018
from$ 342*Viewed: 38 minutes ago
Boston (BOS)
to St. Louis (STL)
Roundtrip
Depart Mon 10 Sep 2018
Return Tue 25 Sep 2018
from$ 342*Viewed: 38 minutes ago
*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 St. Louis

92 °FSunday06/17/2018
91 °FMonday06/18/2018
91 °FTuesday06/19/2018
88 °FWednesday06/20/2018
75 °FThursday06/21/2018
87 °FFriday06/22/2018
85 °FSaturday06/23/2018
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