Cheap flights from Newark Airport to Seattle from $109

In general, October is the cheapest month to fly from Newark Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $284. If you don’t want to visit Seattle in October, then you should wait until January to fly from Newark Airport, when ticket prices are also cheap, with an average price of $307.

On average, the least expensive day to fly to Seattle from Newark Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $456. 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 Newark Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $527.

Flying to Seattle from Newark Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $370 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $573. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Seattle from Newark Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $387 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Newark Airport for as low as $330 on momondo.

There are 4 cabin classes available to choose from on Newark 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.

You could potentially save up to 9% on your flight if you consider stops on a Newark Airport to Seattle flight.

As of February 2026, prices for Newark Airport to Seattle flights are approximately 9% cheaper when compared to flights at the same time last year.

Alaska Airlines and United Airlines are the most popular carriers operating from Newark to Seattle/Tacoma Intl

United Airlines, Alaska Airlines and Hawaiian Airlines are the top three most popular airlines that fly to Seattle from Newark Airport according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% of flights between Newark and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 195 minutes.

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

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

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 15% of their flights experiencing any sort of delay.

Portland (PDX) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Salt Lake City (SLC) offer the lowest average round-trip price of $451.

Flights connecting via Portland (PDX) have the shortest average one-way travel time: 7h 41m.

Salt Lake City (SLC) has the shortest average layover time for this route: 1h 03m.

The number of flights available between Newark Airport and Seattle is 9 per day as of February 2026. The most frequent departure time is 5:00PM, with 47% of daily flights leaving in the afternoon.

As of February 2026, 68 flights take off from Newark Airport and land in Seattle each week. The most common flight departure day for this route is Fri, with 19% of weekly flights taking off on this day.