Cheap Frontier Airlines flights Ontario (ONT) to Washington (IAD)

Cheap Frontier Airlines flights Ontario (ONT) to Washington (IAD)

Prices were available within the past 7 days and start at for one-way flights and $299 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Sep 14 - Thu, Sep 18

ONT

Ontario

IAD

Washington

$299 Roundtrip, found 1 day ago

$299

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Ontario to Washington, returning Thu, Sep 18, priced at $299 found 1 day ago

Sun, Sep 14 - Sun, Sep 21

ONT

Ontario

IAD

Washington

$309 Roundtrip, found 1 day ago

$309

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Ontario to Washington, returning Sun, Sep 21, priced at $309 found 1 day ago

Sun, Sep 21 - Sun, Oct 5

ONT

Ontario

IAD

Washington

$322 Roundtrip, found 1 day ago

$322

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Ontario to Washington, returning Sun, Oct 5, priced at $322 found 1 day ago