Flights from Washington to Ottawa

Cheapest flights from Washington

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 29 - Sat, Aug 30

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$347 Roundtrip, found 15 hours ago

$347

Roundtrip

found 15 hours ago

Select Porter Airlines flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Aug 30, priced at $347 found 15 hours ago

Tue, Jul 29 - Sat, Aug 30

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$354 Roundtrip, found 15 hours ago

$354

Roundtrip

found 15 hours ago

Select Air Canada flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Aug 30, priced at $354 found 15 hours ago

Tue, Jul 29 - Sun, Sep 7

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$357 Roundtrip, found 15 hours ago

$357

Roundtrip

found 15 hours ago

Select United flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sun, Sep 7, priced at $357 found 15 hours ago

Tue, Jul 29 - Sun, Sep 7

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$359 Roundtrip, found 15 hours ago

$359

Roundtrip

found 15 hours ago

Select Porter Airlines flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sun, Sep 7, priced at $359 found 15 hours ago

Wed, Jul 30 - Sat, Aug 30

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$374 Roundtrip, found 15 hours ago

$374

Roundtrip

found 15 hours ago

Select United flight, departing Wed, Jul 30 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Aug 30, priced at $374 found 15 hours ago

Wed, Jul 30 - Thu, Sep 4

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$377 Roundtrip, found 15 hours ago

$377

Roundtrip

found 15 hours ago

Select United flight, departing Wed, Jul 30 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Thu, Sep 4, priced at $377 found 15 hours ago

Tue, Jul 29 - Sat, Aug 30

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$378 Roundtrip, found 15 hours ago

$378

Roundtrip

found 15 hours ago

Select Air Canada flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Aug 30, priced at $378 found 15 hours ago

Wed, Jul 30 - Sat, Sep 6

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$382 Roundtrip, found 15 hours ago

$382

Roundtrip

found 15 hours ago

Select United flight, departing Wed, Jul 30 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Sep 6, priced at $382 found 15 hours ago

Tue, Jul 29 - Sun, Sep 7

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$383 Roundtrip, found 15 hours ago

$383

Roundtrip

found 15 hours ago

Select Air Canada flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sun, Sep 7, priced at $383 found 15 hours ago

Tue, Jul 29 - Sun, Sep 7

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$386 Roundtrip, found 15 hours ago

$386

Roundtrip

found 15 hours ago

Select United flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sun, Sep 7, priced at $386 found 15 hours ago

Wed, Jul 30 - Thu, Aug 28

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$387 Roundtrip, found 15 hours ago

$387

Roundtrip

found 15 hours ago

Select Porter Airlines flight, departing Wed, Jul 30 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Thu, Aug 28, priced at $387 found 15 hours ago

Tue, Jul 29 - Sat, Aug 30

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$389 Roundtrip, found 15 hours ago

$389

Roundtrip

found 15 hours ago

Select Air Canada flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Aug 30, priced at $389 found 15 hours ago

Wed, Jul 30 - Sat, Sep 6

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$392 Roundtrip, found 15 hours ago

$392

Roundtrip

found 15 hours ago

Select United flight, departing Wed, Jul 30 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Sep 6, priced at $392 found 15 hours ago

Wed, Jul 30 - Sat, Aug 30

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$392 Roundtrip, found 15 hours ago

$392

Roundtrip

found 15 hours ago

Select United flight, departing Wed, Jul 30 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Aug 30, priced at $392 found 15 hours ago

Tue, Jul 29 - Sun, Sep 7

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$394 Roundtrip, found 15 hours ago

$394

Roundtrip

found 15 hours ago

Select United flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sun, Sep 7, priced at $394 found 15 hours ago

Wed, Jul 30 - Sat, Aug 30

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$396 Roundtrip, found 15 hours ago

$396

Roundtrip

found 15 hours ago

Select Air Canada flight, departing Wed, Jul 30 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Aug 30, priced at $396 found 15 hours ago

Tue, Jul 29 - Sun, Sep 7

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$397 Roundtrip, found 15 hours ago

$397

Roundtrip

found 15 hours ago

Select United flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sun, Sep 7, priced at $397 found 15 hours ago

Tue, Jul 29 - Sun, Sep 7

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$399 Roundtrip, found 15 hours ago

$399

Roundtrip

found 15 hours ago

Select United flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sun, Sep 7, priced at $399 found 15 hours ago

Tue, Jul 29 - Sun, Sep 7

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$401 Roundtrip, found 15 hours ago

$401

Roundtrip

found 15 hours ago

Select Air Canada flight, departing Tue, Jul 29 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sun, Sep 7, priced at $401 found 15 hours ago

Wed, Jul 30 - Sat, Sep 6

IAD

Washington Dulles Intl.

YOW

Macdonald-Cartier Intl.

$1,315 Roundtrip, found 15 hours ago

$1,315

Roundtrip

found 15 hours ago

Select WestJet flight, departing Wed, Jul 30 from Washington Dulles Intl. to Macdonald-Cartier Intl., returning Sat, Sep 6, priced at $1,315 found 15 hours ago