$173 Cheap United flights Seattle (SEA) to Denver (DEN)

View $173 flight on Thu, Jul 9, 2026Opens in a new window

$173 Cheap United flights Seattle (SEA) to Denver (DEN)

Prices were available within the past 7 days and start at $173 for one-way flights and $305 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Jun 23 - Sat, Jun 27
SEA
Seattle
DEN
Denver
$305 Roundtrip, found 19 hours ago
$305
Roundtrip
found 19 hours ago
Select United flight, departing Tue, Jun 23 from Seattle to Denver, returning Sat, Jun 27, priced at $305 found 19 hours ago

Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city center is 32 minutes. Flights from $253
DEN
Denver Intl.
Cheapest
Average driving time to city center32 min
Flights from $253

Find the cheapest month to fly from Seattle (SEA) to Denver (DEN)

June is typically the cheapest month to fly

From $82 - $228 per traveler.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Popular airline
Frontier Airlines
Distance
1635 km
Average flight time
3 hours 42 mins

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