$122 Cheap United flights St. Louis (STL) to Ontario (ONT)

$122 Cheap United flights St. Louis (STL) to Ontario (ONT)

Prices were available within the past 7 days and start at $122 for one-way flights and $219 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Nov 3 - Thu, Nov 6

STL

St. Louis

ONT

Ontario

$219 Roundtrip, found 18 hours ago

$219

Roundtrip

found 18 hours ago

Select United flight, departing Mon, Nov 3 from St. Louis to Ontario, returning Thu, Nov 6, priced at $219 found 18 hours ago

Mon, Nov 3 - Thu, Nov 6

STL

St. Louis

ONT

Ontario

$243 Roundtrip, found 18 hours ago

$243

Roundtrip

found 18 hours ago

Select United flight, departing Mon, Nov 3 from St. Louis to Ontario, returning Thu, Nov 6, priced at $243 found 18 hours ago

Mon, Nov 3 - Thu, Nov 6

STL

St. Louis

ONT

Ontario

$262 Roundtrip, found 18 hours ago

$262

Roundtrip

found 18 hours ago

Select United flight, departing Mon, Nov 3 from St. Louis to Ontario, returning Thu, Nov 6, priced at $262 found 18 hours ago

Mon, Nov 3 - Thu, Nov 6

STL

St. Louis

ONT

Ontario

$264 Roundtrip, found 18 hours ago

$264

Roundtrip

found 18 hours ago

Select United flight, departing Mon, Nov 3 from St. Louis to Ontario, returning Thu, Nov 6, priced at $264 found 18 hours ago

Mon, Nov 3 - Thu, Nov 6

STL

St. Louis

ONT

Ontario

$267 Roundtrip, found 18 hours ago

$267

Roundtrip

found 18 hours ago

Select United flight, departing Mon, Nov 3 from St. Louis to Ontario, returning Thu, Nov 6, priced at $267 found 18 hours ago

Mon, Nov 3 - Thu, Nov 6

STL

St. Louis

ONT

Ontario

$286 Roundtrip, found 18 hours ago

$286

Roundtrip

found 18 hours ago

Select United flight, departing Mon, Nov 3 from St. Louis to Ontario, returning Thu, Nov 6, priced at $286 found 18 hours ago