Cheap flights from Seattle to Denver from R1 592

The cheapest month to fly to Denver from Seattle is in January. Flight prices, which tend to average around R2 582, 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 February to fly from Seattle, when ticket prices are also cheap, with an average price of R3 248.

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

You are more likely to see cheaper flights to Denver from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around R4 049 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Seattle for as low as R3 378 on momondo.

There is only 1 cabin class available to choose from on Seattle to Denver 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 Seattle and Denver have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

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

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

According to our data, United Airlines have had the fewest delays on this route over the last 12 months, with about 8% of their flights experiencing any sort of delay.

The number of flights available between Seattle and Denver is 27 per day as of September 2026. The most frequent departure time is 13:00, with 41% of daily flights leaving in the afternoon.

As of September 2026, there are 192 flights per week flying from Seattle to Denver. The most common day of the week flights depart is Sun, with 20% of flights taking off on this day.