How many flights from Philadelphia to Seattle are non-stop?

Across the trailing 90 days, approximately 15.4% of flights from Philadelphia to Seattle were non-stop. For flights that included stopovers, travelers typically encountered 2 stops. This indicates that direct routes are less common for this particular journey.

How long is the flight from Philadelphia to Seattle?

The typical direct flight from Philadelphia to Seattle has a median duration of 5 hours and 59 minutes, covering a distance of 3818 kilometers. Flights with one stop generally take longer, with a median duration of 9 hours and 55 minutes. Travelers should account for these differences in travel time when planning their trip.

How often do Philadelphia to Seattle flight prices drop?

Historically, flight prices for the Philadelphia to Seattle route have shown frequent drops. This indicates that travelers may often find opportunities for price reductions. These observations are based on data collected over a trailing 30-day period.

Flights From Philadelphia

To Seattle

Cheap Flights from Philadelphia to Seattle

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Deals from

Philadelphia

RatePunk searches hundreds of travel sites at once for deals on flights to Seattle

Prices updated 2 days ago

405 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Jul 26, 2026.)

Today’s best flight deals from Philadelphia to Seattle

Explore current cheapest deals departing from Philadelphia to Seattle

2026-08-31 – 2026-09-15
PHL - Seattle
85% AI deal score
$378
$179
Round trip
2026-08-24 – 2026-08-26
PHL - Seattle
88% AI deal score
$458
$180
Round trip
2026-09-14 – 2026-10-06
PHL - Seattle
89% AI deal score
$343
$181
Round trip
2026-09-15 – 2026-09-22
PHL - Seattle
85% AI deal score
$391
$187
Round trip
2026-09-01 – 2026-09-09
PHL - Seattle
87% AI deal score
$367
$207
Round trip
2026-08-22 – 2026-08-26
PHL - Seattle
84% AI deal score
$455
$212
Round trip
2026-08-19 – 2026-08-27
PHL - Seattle
89% AI deal score
$419
$212
Round trip
2026-08-18 – 2026-08-27
PHL - Seattle
89% AI deal score
$412
$213
Round trip
2026-08-17 – 2026-08-26
PHL - Seattle
88% AI deal score
$412
$218
Round trip
2026-08-20 – 2026-08-26
PHL - Seattle
89% AI deal score
$439
$224
Round trip

Philadelphia to Seattle: Overview

Insights for flights from Philadelphia to Seattle

For travelers seeking cheap flights from Philadelphia to Seattle, the data indicates that February is typically the most affordable month, with a median fare of $195. Other cost-effective options include May, where the median fare is $228, and September, with a median of $329. Planning your trip around these months can lead to more favorable prices.

Right now, fares for flights from Philadelphia to Seattle are below the typical level. Prices for this route typically range from $494–$1016, with a median of $710. Currently, only 5% of recent fares are classified as a good price, suggesting that while current prices are lower than usual, finding exceptionally cheap flights from Philadelphia to Seattle may still require some flexibility. New deals appear almost daily, so setting a price alert could be beneficial.

A typical journey from Philadelphia to Seattle takes about 5h 59m, including connections. Given that most itineraries connect at least once, with a median of 2 stopovers when connecting, the overall travel time can vary significantly. Direct flights from Philadelphia to Seattle are less common, with only 15.4% of recent fares being non-stop.

The distance between Philadelphia and Seattle is approximately 3818 kilometers. This classifies the route as a medium-haul journey, indicating a significant but not extremely long flight duration.

How much is a round trip from Philadelphia to Seattle

Regular price: $294 - $386

Prices for flights from Philadelphia to Seattle are currently below the regular range.

The regular price range for flights from Philadelphia to Seattle is $294 to $386. The current lowest deal is $206 with Frontier Airlines, for travel from Sep 1-Sep 9.

now $206

Low $294

High $386

The cheapest time to fly from Philadelphia to Seattle

The cheapest month to fly from Philadelphia to Seattle is May, with a median price of $319. The most expensive month is July, with a median price of $827. Generally, prices are lower from January to December.

May

Cheapest

Flights from $319

July

Most Expensive

Flights from $827

Jan

Feb

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Philadelphia to Seattle

Alaska Airlines, Inc.

Last-minute flights going from Philadelphia to Seattle

Wed, Aug 5

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$493

$293

One-way

Fri, Aug 7

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$539

$309

One-way

Thu, Aug 13

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$458

$280

One-way

Fri, Aug 14

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$479

$285

One-way

Sun, Aug 16

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$417

$253

One-way

Mon, Aug 17

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$417

$258

One-way

Biggest price drops on these dates for flights from Philadelphia to Seattle

4 nights

Aug 7 - Aug 11

$539 → $309

43%

2 nights

Aug 25 - Aug 27

$468 → $239

49%

1 night

Aug 25 - Aug 26

$468 → $239

49%

2 nights

Aug 26 - Aug 28

$467 → $239

49%

Popular Airports to fly from Philadelphia to Seattle

Philadelphia - Seattle route insights

💸 Price insights

Recent fares are below the typical level at $206.

Recent fares from Philadelphia to Seattle are below the typical level, with 5% good prices.

📅 Best time to fly

Historically, May is the cheapest month to fly at $319.

Prices are historically lowest in May at $319. July is typically the most expensive month.

⏱️ Flight duration

Direct flights average 5h 59m.

Direct flights to Seattle typically take 5h 59m, while connecting flights average 25h 44m.

✈️ Airlines & availability

Connecting flights are dominant on this route.

Only 15.4% of recent flights from Philadelphia to Seattle are direct, with 2 stopovers typical.

🏆 Airline highlight

Frontier Airlines offers a recent deal at $206.

A recent deal on Frontier Airlines for $206 was found for September 1-September 9.

🎯 Booking tip

Deals appear frequently for this route.

Deals for flights from Philadelphia to Seattle are frequent, appearing often in a 30-day window.

Philadelphia main airports to depart from

Philadelphia International (PHL)

Cheapest

Philadelphia International Airport is a great choice for flights from Philadelphia to Seattle.

📍 ~10 km from city center (reachable by car or train)

💸 Flights from ~$230

Seattle main airports to arrive at

Seattle–Tacoma International (SEA)

Cheapest

Seattle–Tacoma International Airport is a primary arrival option for flights from Philadelphia to Seattle.

📍 ~19 km from Seattle city center (reachable by car, bus, or train).

💸 Flights from ~$230

Airports nearby Seattle used as alternative

Paine Field Everett (PAE)

Paine Field Everett is a useful alternative for travelers in North Seattle or Snohomish County.

📍 ~45 km from Seattle (reachable by car)

💸 Flights from ~$347

Business & First Class Flight Deals to Seattle

87% AI deal score

$1,346

$921

Save $425

Frequently Asked Questions About Flights to Seattle

Historically, the optimal booking window for flights from Philadelphia to Seattle is typically 7-13 days before departure. During this period, the average price observed was around $551. Booking 0-6 days out saw an average price of $837, while booking 60+ days in advance resulted in a significantly higher average price of $1250. These trends were observed across the trailing 90 days.

Across the trailing quarter, a good price for a flight from Philadelphia to Seattle is considered to be $494 or less. The median price for this route was $710. Prices can vary, with 75% of fares being $1016 or less. These figures provide a benchmark for what constitutes a cost-effective fare.

Historically, February has been the cheapest month to fly from Philadelphia to Seattle, with a median price of $195. May also offered competitive prices, with a median of $228. While September had a median price of $329, it was also identified as the most expensive month within the trailing 270 days, compared to an annual median of $710.

Related routes

More routes from Philadelphia

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Flights to Seattle from other cities

Flights from Phoenix to Seattle Flights from Pittsburgh to Seattle Flights from Raleigh to Seattle Flights from Reno to Seattle Flights from Sacramento to Seattle Flights from Salt Lake City to Seattle Flights from San Antonio to Seattle Flights from San Diego to Seattle Flights from San Francisco to Seattle Flights from San Jose to Seattle Flights from Santa Barbara to Seattle Flights from Singapore to Seattle

Philadelphia to Seattle: Overview

Insights for flights from Philadelphia to Seattle

How much is a round trip from Philadelphia to Seattle

Regular price: $294 - $386

Prices for flights from Philadelphia to Seattle are currently below the regular range.

The regular price range for flights from Philadelphia to Seattle is $294 to $386. The current lowest deal is $206 with Frontier Airlines, for travel from Sep 1-Sep 9.

now $206

Low $294

High $386

The cheapest time to fly from Philadelphia to Seattle

May

Cheapest

Flights from $319

July

Most Expensive

Flights from $827

Jan

Feb

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Philadelphia to Seattle

Alaska Airlines, Inc.

Last-minute flights going from Philadelphia to Seattle

Wed, Aug 5

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$493

$293

One-way

Fri, Aug 7

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$539

$309

One-way

Thu, Aug 13

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$458

$280

One-way

Fri, Aug 14

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$479

$285

One-way

Sun, Aug 16

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$417

$253

One-way

Mon, Aug 17

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$417

$258

One-way

Biggest price drops on these dates for flights from Philadelphia to Seattle

4 nights

Aug 7 - Aug 11

$539 → $309

43%

2 nights

Aug 25 - Aug 27

$468 → $239

49%

1 night

Aug 25 - Aug 26

$468 → $239

49%

2 nights

Aug 26 - Aug 28

$467 → $239

49%

Popular Airports to fly from Philadelphia to Seattle