Flights from Seattle, WA to Denver, CO

Promo Code

Best Deals on Flights From Seattle, WA (SEA) to Denver, CO (DEN)

Apr 2026
from$59*
Last seen: 9 hours ago
One-way/Economy
May 2026
from$33*
Last seen: 7 hours ago
One-way/Economy
Jun 2026
from$33*
Last seen: 12 hours ago
One-way/Economy
$42
$178
Displaying fares for April-2026
  • 17

    Fri

    APR

  • 18

    Sat

  • 19

    Sun

  • 20

    Mon

  • 21

    Tue

  • 22

    Wed

  • 23

    Thu

  • 24

    Fri

  • 25

    Sat

  • 26

    Sun

  • 27

    Mon

  • 28

    Tue

  • 29

    Wed

  • 30

    Thu

  • 01

    Fri

    MAY

  • 02

    Sat

  • 03

    Sun

  • 04

    Mon

  • 05

    Tue

  • 06

    Wed

  • 07

    Thu

  • 08

    Fri

  • 09

    Sat

  • 10

    Sun

  • 11

    Mon

  • 12

    Tue

  • 13

    Wed

  • 14

    Thu

  • 15

    Fri

  • 16

    Sat

    • Range$42-$178

    *Prices found by others in the previous 48 hours for round-trip flights. Prices shown may also require membership in our travel club, Discount Den.

    Flights Deals from Seattle, WA to Denver, CO on Frontier

    $
    Flights Deals from Seattle, WA to Denver, CO on Frontier
    From
    To
    Seattle, WA (SEA)Denver, CO (DEN)One-way
    /
    Discount Den Basic Fare    		Departing Sep 1, 2026

    From

    $73

    Last seen: 22 hours ago

    *Prices found by others in the previous 48 hours for one-way flights. Prices shown may also require membership in our travel club, Discount Den®.

    Seattle, WA Denver, CO

    Barclays Badge

    Earn 50,000 Miles after qualifying activity. Plus $0 Intro Annual Fee, then $99.
    Terms Apply.