Book United Ontario to St. Louis flight deals from $318

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Search flights from Ontario to St. Louis (ONT - STL)

March

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Depart: 03/13/19

Return: 03/27/19
from$ 318*Viewed: 7 hours ago

Depart: 03/26/19

Return: 04/09/19
from$ 318*Viewed: 7 hours ago

Depart: 03/27/19

Return: 04/10/19
from$ 318*Viewed: 7 hours ago

April

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Depart: 04/02/19

Return: 04/16/19
from$ 318*Viewed: 7 hours ago

Depart: 04/16/19

Return: 04/30/19
from$ 318*Viewed: 7 hours ago

Depart: 04/17/19

Return: 05/01/19
from$ 318*Viewed: 7 hours ago

May

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Depart: 05/04/19

Return: 05/18/19
from$ 356*Viewed: 7 hours ago

Depart: 05/07/19

Return: 05/21/19
from$ 326*Viewed: 7 hours ago

Depart: 05/15/19

Return: 05/29/19
from$ 364*Viewed: 7 hours 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.

Plan ahead for flights from Ontario to St. Louis

from
to
Type
Dates
Price*
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 03/12/19
Return: 03/26/19
from$ 318*Viewed: 7 hours ago
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 03/13/19
Return: 03/27/19
from$ 318*Viewed: 7 hours ago
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 03/19/19
Return: 04/02/19
from$ 318*Viewed: 7 hours ago
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 03/26/19
Return: 04/09/19
from$ 318*Viewed: 7 hours ago
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 03/27/19
Return: 04/10/19
from$ 318*Viewed: 7 hours ago
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 04/02/19
Return: 04/16/19
from$ 318*Viewed: 7 hours ago
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 04/09/19
Return: 04/23/19
from$ 318*Viewed: 7 hours ago
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 04/16/19
Return: 04/30/19
from$ 318*Viewed: 7 hours ago
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 04/17/19
Return: 05/01/19
from$ 318*Viewed: 7 hours ago
Ontario (ONT)
to St. Louis (STL)
Roundtrip
Depart: 04/23/19
Return: 05/07/19
from$ 318*Viewed: 7 hours 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

33 °FTuesday02/19/19
45 °FWednesday02/20/19
43 °FThursday02/21/19
44 °FFriday02/22/19
42 °FSaturday02/23/19
38 °FSunday02/24/19
29 °FMonday02/25/19
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