Cheap Flights Seattle to Denver from CAD 28

Flight FAQs

• Which airlines offer the cheapest flights from Seattle (SEA) to Denver (DEN)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as CAD 28 on Cheapest nonstop routes (e.g. SEA to DEN on Thu, Aug 27), while Frontier Airlines offers Cheapest nonstop round-trips from CAD 81 departing on Fri, Aug 28 and returning on Wed, Sep 2.

• Which airlines offer direct flights from Seattle to Denver?

  At the moment, you can catch a direct flight from Seattle to Denver with the following airlines, including: Frontier Airlines Alaska Airlines Delta Air Lines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is the flight from Seattle (SEA) to Denver (DEN)?

  It takes about 2 hours 48 minutes to fly from Seattle (SEA) to Denver (DEN).

• When is the best time to book flights from Seattle to Denver?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Denver is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Seattle to Denver?

  Based on Trip.com data in the past 4 weeks, there is 67 flight per week flying from Seattle to Denver. You can check the weekly schedule for popular airlines on this route below: Delta Air Lines: S/M/T/W/T/F/S -- DL1358 (08:24)

• How can I find the best deals on flights from Seattle to Denver?

  To find best deals on flights from Seattle to Denver, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, Aug 27, with one-way flights priced at just CAD 28.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Denver travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When is the best time to book a flight from Seattle to Denver to get the best price?

  The cheapest months to fly from Seattle to Denver is November, when demand for travel is lower.

• Which upcoming date is the cheapest for flights from Seattle to Denver?

  After crunching the numbers on our July flight calendar, it's currently cheapest to fly from Seattle to Denver on July 31, 2026 with Frontier Airlines, with prices starting at CAD 167.

• Which airports can I fly through when travelling to Denver from Seattle?

  You can land at any one of the following hubs in Denver, with Seattle-Tacoma International Airport to Denver International Airport (SEA-DEN) is by far the most common option on this route: Rocky Mountain Metropolitan Airport (BJC) Denver International Airport (DEN).

• What is the time difference between Seattle and Denver?

  The time difference between Denver and Seattle is 1h.

• How can I change or cancel my flight ticket from Seattle to Denver?

  Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.