$99 Cheap United flights Seattle (SEA) to Denver (DEN)

View $99 flight on Wed, Feb 25, 2026Opens in a new window

$99 Cheap United flights Seattle (SEA) to Denver (DEN)

Prices were available within the past 7 days and start at $99 for one-way flights and $117 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Feb 25 - Sat, Feb 28
SEA
Seattle
DEN
Denver
$117 Roundtrip, found 1 day ago
$117
Roundtrip
found 1 day ago
Select United flight, departing Wed, Feb 25 from Seattle to Denver, returning Sat, Feb 28, priced at $117 found 1 day ago
United
Wed, Feb 25 - Sat, Feb 28
SEA
Seattle
DEN
Denver
$132 Roundtrip, found 1 day ago
$132
Roundtrip
found 1 day ago
Select United flight, departing Wed, Feb 25 from Seattle to Denver, returning Sat, Feb 28, priced at $132 found 1 day ago
United
Wed, Feb 25 - Sat, Feb 28
SEA
Seattle
DEN
Denver
$136 Roundtrip, found 1 day ago
$136
Roundtrip
found 1 day ago
Select United flight, departing Wed, Feb 25 from Seattle to Denver, returning Sat, Feb 28, priced at $136 found 1 day ago

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

February is typically the cheapest month to fly

From $58 - $152 per traveler.

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 $82
DEN
Denver Intl.
Cheapest
Average driving time to city center32 min
Flights from $82
Flights from Seattle (SEA) to Denver (DEN)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, United
Popular airline
American Airlines
Distance
1635 km
Average flight time
3 hours 36 mins