$172 Cheap Delta flights St. Louis (STL) to Ontario (ONT)

$172 Cheap Delta flights St. Louis (STL) to Ontario (ONT)

Prices were available within the past 7 days and start at $172 for one-way flights and $307 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jul 16 - Tue, Jul 22

STL

St. Louis

ONT

Ontario

$307 Roundtrip, found 1 day ago

$307

Roundtrip

found 1 day ago

Select Delta flight, departing Wed, Jul 16 from St. Louis to Ontario, returning Tue, Jul 22, priced at $307 found 1 day ago

Sat, Jul 19 - Tue, Jul 22

STL

St. Louis

ONT

Ontario

$327 Roundtrip, found 1 day ago

$327

Roundtrip

found 1 day ago

Select Delta flight, departing Sat, Jul 19 from St. Louis to Ontario, returning Tue, Jul 22, priced at $327 found 1 day ago

Wed, Jul 16 - Thu, Jul 24

STL

St. Louis

ONT

Ontario

$352 Roundtrip, found 1 day ago

$352

Roundtrip

found 1 day ago

Select Delta flight, departing Wed, Jul 16 from St. Louis to Ontario, returning Thu, Jul 24, priced at $352 found 1 day ago

Sat, Jun 28 - Tue, Jul 8

STL

St. Louis

ONT

Ontario

$353 Roundtrip, found 2 days ago

$353

Roundtrip

found 2 days ago

Select Delta flight, departing Sat, Jun 28 from St. Louis to Ontario, returning Tue, Jul 8, priced at $353 found 2 days ago

Sun, Jun 29 - Tue, Jul 8

STL

St. Louis

ONT

Ontario

$362 Roundtrip, found 2 days ago

$362

Roundtrip

found 2 days ago

Select Delta flight, departing Sun, Jun 29 from St. Louis to Ontario, returning Tue, Jul 8, priced at $362 found 2 days ago

Sat, Jul 19 - Thu, Jul 24

STL

St. Louis

ONT

Ontario

$372 Roundtrip, found 1 day ago

$372

Roundtrip

found 1 day ago

Select Delta flight, departing Sat, Jul 19 from St. Louis to Ontario, returning Thu, Jul 24, priced at $372 found 1 day ago

Thu, Jul 17 - Thu, Jul 24

STL

St. Louis

ONT

Ontario

$397 Roundtrip, found 1 day ago

$397

Roundtrip

found 1 day ago

Select Delta flight, departing Thu, Jul 17 from St. Louis to Ontario, returning Thu, Jul 24, priced at $397 found 1 day ago

Sat, Jun 28 - Fri, Jul 11

STL

St. Louis

ONT

Ontario

$398 Roundtrip, found 2 days ago

$398

Roundtrip

found 2 days ago

Select Delta flight, departing Sat, Jun 28 from St. Louis to Ontario, returning Fri, Jul 11, priced at $398 found 2 days ago