Cheap flights from Dallas to Seattle from $99

In general, April is the cheapest month to fly from Dallas to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $244. If you don’t want to visit Seattle in April, then you should wait until March to fly from Dallas, when ticket prices are also cheap, with an average price of $263.

On average, the least expensive day to fly to Seattle from Dallas is on a Friday. momondo users have found tickets for Friday departures for as low as $330. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Dallas because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $412.

Flying to Seattle from Dallas in the morning is the least expensive time of day to depart. momondo users have found prices as low as $355 when looking at flights departing in the morning. Flights to Seattle are more costly in the evening, with an average ticket price of $388. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Dallas/Fort Worth to Seattle/Tacoma Intl for the best Dallas - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from Dallas when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $285 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Dallas for as low as $260 on momondo.

There are 4 cabin classes available to choose from on Dallas to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, Southwest, and Alaska Airlines are the most popular carriers operating from Dallas to Seattle/Tacoma Intl

Alaska Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Seattle from Dallas according to our data. Alaska Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 8 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Historically, on average around 21% of flights between Dallas and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 159 minutes.

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

Monday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

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

The number of flights available between Dallas and Seattle is 12 per day as of February 2026. The most frequent departure time is 10:00AM, with 47% of daily flights leaving at noon.

89 flights are operational weekly from Dallas to Seattle as of February 2026. The most popular departure day for this route is Tue, with 55% of flights per week taking off on this day.