Cheap flights from Washington to Denver from $94

The cheapest month to fly to Denver from State of Washington is in January. Flight prices, which tend to average around $177, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in January, then you should wait until October to fly from State of Washington, when ticket prices are also cheap, with an average price of $202.

The cheapest day to depart on your flight to Denver is on a Friday when prices can be found for as low as $308. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $376.

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $264. Flights in the morning are often more expensive with an average ticket price of $372.

Fly from Seattle/Tacoma Intl to Denver Intl for the best Washington - Denver Intl flight prices

You are more likely to see cheaper flights to Denver from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $238 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from State of Washington for as low as $191 on momondo.

There are 4 cabin classes available to choose from on State of Washington to Denver flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest, United Airlines, and Delta are the most popular carriers operating from Washington to Denver Intl

Frontier, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Denver from State of Washington according to our data. Frontier is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 7 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

50 flights are operational daily from State of Washington to Denver as of August 2026. The most popular departure time for this route is 1:00PM, with 42% of flights per day taking off in the afternoon.

354 flights are operational weekly from State of Washington to Denver as of August 2026. The most popular departure day for this route is Tue, with 19% of flights per week taking off on this day.