Cheap flights from Philadelphia to Seattle from $100
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Seattle departing on 7/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Spirit Airlines flights from Philadelphia to Seattle
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American Airlines flights from Philadelphia to Seattle
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How to get the cheapest flight ticket from Philadelphia to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Philadelphia and Seattle?
What is the cheapest month to fly to Seattle?
In general, March is the cheapest month to fly from Philadelphia to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $367. If you don’t want to visit Seattle in March, then you should wait until February to fly from Philadelphia, when ticket prices are also cheap, with an average price of $391.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Philadelphia is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $477. 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 Philadelphia because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $579.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Philadelphia at noon is the least expensive time of day to depart. momondo users have found prices as low as $416 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $546. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Philadelphia to Seattle/Tacoma Intl flight route?
Fly from Philadelphia to Seattle/Tacoma Intl for the best Philadelphia - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Philadelphia when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $433 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Philadelphia for as low as $389 on momondo.
What cabin class options are available on Philadelphia to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on Philadelphia 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.
What is the cheapest airline that flies from Philadelphia to Seattle/Tacoma Intl?
Frontier, Delta, and Spirit Airlines are the most popular carriers operating from Philadelphia to Seattle/Tacoma Intl
What airlines fly to Seattle?
Alaska Airlines, United Airlines and American Airlines are the top three most popular airlines that fly to Seattle from Philadelphia 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 10 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
How many flights depart from Philadelphia to Seattle on average per day?
As of June 2025, 10 flights take off from Philadelphia and land in Seattle each day. The most common flight departure time for this route is 7:00AM, with 53% of daily flights taking off in the evening.
How many flights depart from Philadelphia to Seattle on average per week?
The number of flights available between Philadelphia and Seattle is 71 per week as of June 2025. The most frequent departure day is Wed, with 15% of weekly flights leaving on this day.
When to book flights from Philadelphia to Seattle
Cheap Philadelphia to Seattle (PHL to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Seattle
How far is Philadelphia to Seattle/Tacoma Intl by plane?
The straight-line distance from Philadelphia to Seattle/Tacoma Intl is 2372.3 mi. 5h 52m is a normal flight duration for this route.
When did momondo last update prices for flights from Philadelphia Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Philadelphia Airport to Seattle/Tacoma Intl Airport refresh daily.
How many operators does momondo search for flights from Philadelphia Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Philadelphia Airport to Seattle/Tacoma Intl Airport is 10 as of June 2025.
How old do you have to be to fly from Philadelphia Airport to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Philadelphia to Seattle?
momondo data reveals that the most frequently booked plane model on the route from Philadelphia to Seattle is Boeing 737 MAX 9, representing 42.16% of all bookings. The subsequent popular models are Airbus A321-100/200 at 29.90%, Boeing 737-900 Passenger/BBJ3 (winglets) at 19.53%, and Boeing 737 at 2.99%.
What is the most popular airline from Philadelphia to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Philadelphia to Seattle is American Airlines (47% of total bookings). The next most popular airlines are Alaska Airlines (32%), Delta (7%), and Frontier (4%).
Best airlines flying from Philadelphia to Seattle
Compare and see reviews for airlines that fly from Philadelphia to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $128 | Free Cancellation | Rating 5.9 3,296 reviews | |||
| PriceFrom $140 | Free Cancellation | Rating 6.3 8,060 reviews | |||
| PriceFrom $198 | Free Cancellation | Rating 6.9 345 reviews | |||
| PriceFrom $229 | Free Cancellation | Rating 7.3 2,922 reviews | |||
| PriceFrom $285 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $286 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $292 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $297 | Free Cancellation | Rating 7.8 2,501 reviews | |||
| PriceFrom $303 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $327 | Free Cancellation | Rating 8.0 4,278 reviews |
Alaska Airlines Flights From Philadelphia to Seattle
Alaska Airlines flies from Philadelphia to Seattle around 9 times per week, with 10,000 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Philadelphia to Seattle in the last 72 hours was $292 (round-trip), much lower than the average airfare cost of $488 for Alaska Airlines flights on this route.
Hawaiian Airlines Flights From Philadelphia to Seattle
Hawaiian Airlines (7.8/10 from 2,501 reviews) operates around 15 flights from Philadelphia to Seattle in any given week. The average Hawaiian Airlines airfare for this route is around $499, with deals from around $297 rare but found on momondo. Referenced prices are for round-trip Philadelphia to Seattle flight searches in the last 72 hours.
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Why should I use momondo to find a flight deal from Philadelphia to Seattle?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Philadelphia to Seattle. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Philadelphia to Seattle with flexible booking policies on momondo?
Yes. All flights to Seattle from Philadelphia on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Philadelphia to Seattle?
momondo provides multiple filters to help you find the best flight to Seattle from Philadelphia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Philadelphia to Seattle right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Philadelphia to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.