Cheap flights from the United States to Seattle from $63

In general, October is the cheapest month to fly from United States to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $287. If you don’t want to visit Seattle in October, then you should wait until September to fly from United States, when ticket prices are also cheap, with an average price of $307.

On average, the least expensive day to fly to Seattle from United States is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $442. 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 United States because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $518.

Flying to Seattle from United States in the evening is the least expensive time of day to depart. momondo users have found prices as low as $371 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $567. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Las Vegas Harry Reid Intl to Seattle/Tacoma Intl for the best United States - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $420 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from United States for as low as $355 on momondo.

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

Delta, Southwest, and Frontier are the most popular carriers operating from United States to Seattle/Tacoma Intl

Alaska Airlines, Delta and Frontier are the top three most popular airlines that fly to Seattle from United States according to our data. Alaska Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 11 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Historically, on average around 15% of flights between United States and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 148 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.

Tuesday 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, Delta have had the least number of delays on this route over the last 12 months; with about 10% of their flights experiencing any sort of delay.

276 flights are operational daily from United States to Seattle as of April 2026. The most popular departure time for this route is 8:00PM, with 35% of flights per day taking off at noon.

1,937 flights are operational weekly from United States to Seattle as of April 2026. The most popular departure day for this route is Thu, with 20% of flights per week taking off on this day.