Cheap flights from Denver to Seattle from R2 218

The cheapest month to fly to Seattle from Denver is in January. Flight prices, which tend to average around R2 516, are often lower during this time because this is during the off-season. If you aren’t able to travel to Seattle during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of R2 897.

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

You are more likely to see cheaper flights to Seattle from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around R4 191 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Denver for as low as R3 692 on momondo.

There is only 1 cabin class available to choose from on Denver to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 17% of flights between Denver and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 140 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, Frontier have had the fewest delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

12 flights are operational daily from Denver to Seattle as of November 2026. The most popular departure time for this route is 7:00, with 45% of flights per day taking off at midday.

As of November 2026, there are 90 flights per week flying from Denver to Seattle. The most common day of the week flights depart is Wed, with 36% of flights taking off on this day.