Flights from Seattle to Ontario

Cheapest flights from Seattle

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, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$197 Roundtrip, found 6 days ago

$197

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $197 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$197 Roundtrip, found 6 days ago

$197

Roundtrip

found 6 days ago

Select Delta flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $197 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$217 Roundtrip, found 6 days ago

$217

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $217 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$227 Roundtrip, found 6 days ago

$227

Roundtrip

found 6 days ago

Select Delta flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $227 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$234 Roundtrip, found 6 days ago

$234

Roundtrip

found 6 days ago

Select United flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $234 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$237 Roundtrip, found 6 days ago

$237

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $237 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$244 Roundtrip, found 6 days ago

$244

Roundtrip

found 6 days ago

Select United flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $244 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$257 Roundtrip, found 6 days ago

$257

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $257 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$264 Roundtrip, found 6 days ago

$264

Roundtrip

found 6 days ago

Select United flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $264 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$267 Roundtrip, found 6 days ago

$267

Roundtrip

found 6 days ago

Select Delta flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $267 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$271 Roundtrip, found 6 days ago

$271

Roundtrip

found 6 days ago

Select American Airlines flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $271 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$275 Roundtrip, found 6 days ago

$275

Roundtrip

found 6 days ago

Select United flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $275 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$277 Roundtrip, found 6 days ago

$277

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $277 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$285 Roundtrip, found 6 days ago

$285

Roundtrip

found 6 days ago

Select United flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $285 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$287 Roundtrip, found 6 days ago

$287

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $287 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$291 Roundtrip, found 6 days ago

$291

Roundtrip

found 6 days ago

Select United flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $291 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$297 Roundtrip, found 6 days ago

$297

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $297 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$299 Roundtrip, found 6 days ago

$299

Roundtrip

found 6 days ago

Select United flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $299 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

SEA

Seattle - Tacoma Intl.

BOI

Boise

$302 Roundtrip, found 6 days ago

$302

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Sat, Jun 7 from Seattle - Tacoma Intl. to Boise, returning Mon, Jun 9, priced at $302 found 6 days ago

Sat, Jun 7 - Mon, Jun 9

PAE

Seattle Paine Field Intl. Airport

BOI

Boise

$320 Roundtrip, found 6 days ago

$320

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Sat, Jun 7 from Seattle Paine Field Intl. Airport to Boise, returning Mon, Jun 9, priced at $320 found 6 days ago