Flights from San Francisco to Williamstown

Cheapest flights from San Francisco

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.

Sat, Oct 18 - Thu, Oct 23

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$434 Roundtrip, found 19 hours ago

$434

Roundtrip

found 19 hours ago

Select WestJet flight, departing Sat, Oct 18 from San Francisco Intl. to Macdonald-Cartier Intl., returning Thu, Oct 23, priced at $434 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$491 Roundtrip, found 19 hours ago

$491

Roundtrip

found 19 hours ago

Select WestJet flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $491 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$518 Roundtrip, found 19 hours ago

$518

Roundtrip

found 19 hours ago

Select WestJet flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $518 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$536 Roundtrip, found 19 hours ago

$536

Roundtrip

found 19 hours ago

Select WestJet flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $536 found 19 hours ago

Sat, Oct 18 - Tue, Oct 28

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$555 Roundtrip, found 19 hours ago

$555

Roundtrip

found 19 hours ago

Select Air Canada flight, departing Sat, Oct 18 from San Francisco Intl. to Macdonald-Cartier Intl., returning Tue, Oct 28, priced at $555 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$557 Roundtrip, found 19 hours ago

$557

Roundtrip

found 19 hours ago

Select Air Canada flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $557 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$563 Roundtrip, found 19 hours ago

$563

Roundtrip

found 19 hours ago

Select WestJet flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $563 found 19 hours ago

Thu, Oct 23 - Tue, Oct 28

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$574 Roundtrip, found 19 hours ago

$574

Roundtrip

found 19 hours ago

Select Air Canada flight, departing Thu, Oct 23 from San Francisco Intl. to Macdonald-Cartier Intl., returning Tue, Oct 28, priced at $574 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$575 Roundtrip, found 19 hours ago

$575

Roundtrip

found 19 hours ago

Select Air Canada flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $575 found 19 hours ago

Wed, Oct 22 - Mon, Oct 27

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$578 Roundtrip, found 19 hours ago

$578

Roundtrip

found 19 hours ago

Select Alaska Airlines flight, departing Wed, Oct 22 from San Francisco Intl. to Macdonald-Cartier Intl., returning Mon, Oct 27, priced at $578 found 19 hours ago

Sun, Oct 19 - Tue, Oct 28

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$580 Roundtrip, found 19 hours ago

$580

Roundtrip

found 19 hours ago

Select Air Canada flight, departing Sun, Oct 19 from San Francisco Intl. to Macdonald-Cartier Intl., returning Tue, Oct 28, priced at $580 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$582 Roundtrip, found 19 hours ago

$582

Roundtrip

found 19 hours ago

Select Air Canada flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $582 found 19 hours ago

Fri, Oct 24 - Tue, Oct 28

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$584 Roundtrip, found 19 hours ago

$584

Roundtrip

found 19 hours ago

Select WestJet flight, departing Fri, Oct 24 from San Francisco Intl. to Macdonald-Cartier Intl., returning Tue, Oct 28, priced at $584 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$612 Roundtrip, found 19 hours ago

$612

Roundtrip

found 19 hours ago

Select Alaska Airlines flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $612 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$613 Roundtrip, found 19 hours ago

$613

Roundtrip

found 19 hours ago

Select United flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $613 found 19 hours ago

Sat, Oct 18 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$622 Roundtrip, found 19 hours ago

$622

Roundtrip

found 19 hours ago

Select WestJet flight, departing Sat, Oct 18 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $622 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$632 Roundtrip, found 19 hours ago

$632

Roundtrip

found 19 hours ago

Select Air Canada flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $632 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$633 Roundtrip, found 19 hours ago

$633

Roundtrip

found 19 hours ago

Select WestJet flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $633 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$637 Roundtrip, found 19 hours ago

$637

Roundtrip

found 19 hours ago

Select Air Canada flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $637 found 19 hours ago

Tue, Oct 21 - Sun, Oct 26

SFO

San Francisco Intl.

YOW

Macdonald-Cartier Intl.

$765 Roundtrip, found 19 hours ago

$765

Roundtrip

found 19 hours ago

Select United flight, departing Tue, Oct 21 from San Francisco Intl. to Macdonald-Cartier Intl., returning Sun, Oct 26, priced at $765 found 19 hours ago