⚡ Fare recorded April 25, 2026 · Prices change daily

Denver to Seattle flights

Denver (DEN) to Seattle (SEA): 1,022 miles (1,645 km) great-circle, about 2h 35m nonstop by our estimate. Cheapest fare observed: $178 round-trip on Frontier, nonstop, departing June 22, 2026.

F9FrontierF94545
Depart
DEN
Denver, USA
07:45
2026-06-22
✈
Arrive
SEA
Seattle, United States
Returns 11:03
2026-06-28
Stops
non-stop
Distance
1,022 mi
Est. nonstop time
2h 35m
Trip type
Round-trip
$178
Round-trip · per person
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About this flight

When did the cheapest Denver to Seattle fare fly?

$178 round-trip, Frontier F94545, departing 2026-06-22 at 07:45, returning 2026-06-28. The recorded itinerary left on a Monday, returning on a Sunday 6 nights later; the fare was observed 58 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.

Route facts

How far is Denver from Seattle?

  • Distance: 1,022 miles (1,645 km) great-circle, heading northwest.
  • Estimated nonstop flight time: about 2h 35m.
  • Departure airport: Denver International Airport (DEN), Denver, United States, UTC-6 on June 22, 2026.
  • Arrival: Seattle-Tacoma International Airport (SEA), United States, UTC-7 on June 22, 2026.
  • Time difference: Seattle is 1 hour behind Denver on the recorded date.
  • Route type: domestic, within United States.
  • Arrival airport elevation: 433 ft.
  • Recorded itinerary: Frontier F94545, non-stop, round-trip, 6 days between departure and return.
Fare comparison

How does the Denver to Seattle fare compare with other routes from DEN?

At $178, it ranked 10th of the 30 round-trip fares we recorded from DEN (median $204). That is 17.4 cents per great-circle mile (round-trip price over one-way distance), close to the DEN median of 16.1 cents across 30 round-trip routes.

Routes from DEN of similar length: Louisville (1,021 mi) at $328 and Portland (989 mi) at $97.

Frontier had the cheapest fare on 19 of 30 DEN routes. It is the 18th longest of the 30 routes we track from DEN.

Other ways in

What did other cities pay to fly to Seattle?

Of 18 departure airports with a fare to Seattle, Denver (DEN) ranked 3rd at $178. Lowest: $122 from Houston (IAH); highest: $690 from Punta Cana (PUJ); 5 nonstop. Cheapest-fare airlines (routes): Frontier (13), Alaska Airlines (2), Air Canada (1), Southwest (1) and United Airlines (1).

The reverse, Seattle (SEA) to Denver (DEN), was $242 round-trip on Frontier, nonstop, departing May 10, 2026. Seattle to Denver flights.

Sources

Where do these numbers come from?

Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Denver, America/Los_Angeles; flight time is our estimate.

FAQ

Denver to Seattle flight questions

How far is Denver from Seattle by plane?

+
Denver is about 1,022 miles (1,645 km) from Seattle on a great-circle line from Denver International Airport (DEN) to Seattle-Tacoma International Airport (SEA), heading northwest. It is the 18th longest of the 30 routes we track from DEN. The recorded itinerary was nonstop.

How long is the flight from Denver to Seattle?

+
About 2h 35m nonstop by our estimate for 1,022 miles (500 mph cruise plus 30 minutes, not a timetable). The recorded Frontier fare was nonstop. 18 airports in our feed had a fare to Seattle; this one ranked 3rd, and 5 of the 18 were nonstop.

What is the time difference between Denver and Seattle?

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On June 22, 2026, Denver was on UTC-6 (America/Denver) and Seattle on UTC-7 (America/Los_Angeles), so Seattle was 1 hour behind Denver: noon in Denver was 11:00 in Seattle. Both zones shift for daylight saving together, so the gap stays the same in January and July.

How much is a flight from Denver to Seattle?

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As observed on April 25, 2026: $178 per person round-trip on Frontier flight F94545, departing June 22, 2026, returning June 28, 2026, nonstop. At $178, it ranked 10th of the 30 round-trip fares we recorded from DEN (median $204). That is 17.4 cents per great-circle mile (round-trip price over one-way distance), close to the DEN median of 16.1 cents across 30 round-trip routes. Prices change daily, so check the live fare.

Is there a nonstop flight from Denver to Seattle?

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Yes, the cheapest recorded fare was a nonstop Frontier flight, F94545, on June 22, 2026. Into Seattle, 5 of the 18 recorded fares were nonstop. From DEN, 11 of 30 were. The reverse, Seattle (SEA) to Denver (DEN), was $242 round-trip on Frontier, nonstop, departing May 10, 2026.

Which airports serve flights from Denver to Seattle?

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It departs Denver International Airport (DEN) in Denver, United States, and arrives at Seattle-Tacoma International Airport (SEA) in Seattle, United States. A domestic United States flight. Routes from DEN of similar length: Louisville (1,021 mi) at $328 and Portland (989 mi) at $97.

Where else near Seattle can you fly from Denver?

Portland (PDX) $97San Francisco (SFO) $159Salt Lake City (SLC) $49Las Vegas (LAS) $102Los Angeles (LAX) $189Gunnison (GUC) $285All flights from Denver →

Other cities with flights to Seattle

From Houston (IAH) $122From San Diego (SAN) $172From Las Vegas (LAS) $188From Los Angeles (LAX) $199From Chicago (MDW) $210From Atlanta (ATL) $211

Ready to fly?

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