$139 Cheap Delta flights St. Louis (STL) to Ontario Intl. Airport (ONT)

$139 Cheap Delta flights St. Louis (STL) to Ontario Intl. Airport (ONT)

Prices were available within the past 7 days and start at $139 for one-way flights and $296 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 17 - Wed, Oct 7

STL

St. Louis

ONT

Ontario

$296 Roundtrip, found 22 hours ago

$296

Roundtrip

found 22 hours ago

Select Delta flight, departing Thu, Sep 17 from St. Louis to Ontario, returning Wed, Oct 7, priced at $296 found 22 hours ago

Fri, Sep 18 - Wed, Oct 7

STL

St. Louis

ONT

Ontario

$323 Roundtrip, found 22 hours ago

$323

Roundtrip

found 22 hours ago

Select Delta flight, departing Fri, Sep 18 from St. Louis to Ontario, returning Wed, Oct 7, priced at $323 found 22 hours ago

Sat, Nov 7 - Sat, Nov 21

STL

St. Louis

ONT

Ontario

$359 Roundtrip, found 22 hours ago

$359

Roundtrip

found 22 hours ago

Select Delta flight, departing Sat, Nov 7 from St. Louis to Ontario, returning Sat, Nov 21, priced at $359 found 22 hours ago

Fri, Nov 6 - Sat, Nov 21

STL

St. Louis

ONT

Ontario

$386 Roundtrip, found 22 hours ago

$386

Roundtrip

found 22 hours ago

Select Delta flight, departing Fri, Nov 6 from St. Louis to Ontario, returning Sat, Nov 21, priced at $386 found 22 hours ago

Sat, Nov 7 - Fri, Nov 20

STL

St. Louis

ONT

Ontario

$396 Roundtrip, found 22 hours ago

$396

Roundtrip

found 22 hours ago

Select Delta flight, departing Sat, Nov 7 from St. Louis to Ontario, returning Fri, Nov 20, priced at $396 found 22 hours ago

Tue, Dec 22 - Tue, Jan 5

STL

St. Louis

ONT

Ontario

$403 Roundtrip, found 22 hours ago

$403

Roundtrip

found 22 hours ago

Select Delta flight, departing Tue, Dec 22 from St. Louis to Ontario, returning Tue, Jan 5, priced at $403 found 22 hours ago

Fri, Nov 27 - Sat, Dec 12

STL

St. Louis

ONT

Ontario

$407 Roundtrip, found 22 hours ago

$407

Roundtrip

found 22 hours ago

Select Delta flight, departing Fri, Nov 27 from St. Louis to Ontario, returning Sat, Dec 12, priced at $407 found 22 hours ago

Mon, Dec 14 - Sun, Jan 3

STL

St. Louis

ONT

Ontario

$413 Roundtrip, found 22 hours ago

$413

Roundtrip

found 22 hours ago

Select Delta flight, departing Mon, Dec 14 from St. Louis to Ontario, returning Sun, Jan 3, priced at $413 found 22 hours ago