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

Across the trailing quarter, approximately 15.4% of flights from Philadelphia to Seattle were non-stop. For flights that included stopovers, travelers typically encountered a median of 2 stopovers. This indicates that a significant majority of routes on this path involve at least one connection.

How long is the flight from Philadelphia to Seattle?

The direct flight from Philadelphia to Seattle typically takes 5 hours and 59 minutes, covering a distance of 3818 kilometers. Flights with one stop have a significantly longer median duration, averaging 9 hours and 55 minutes. This difference highlights the time savings associated with non-stop options on this route.

How often do Philadelphia to Seattle flight prices drop?

Historically, flight prices for the Philadelphia to Seattle route have shown frequent drops. This suggests that travelers may often find opportunities to secure lower fares. Monitoring prices regularly across the trailing 30 days could be beneficial for this particular route.

Flights From Philadelphia

To Seattle

Cheap Flights from Philadelphia to Seattle

Browse current best options from Philadelphia. Become a member to unlock all deals and get alerts when new deals appear.

Deals from

Philadelphia

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

Prices updated 1 day ago

461 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Sep 14, 2026.)

Today’s best flight deals from Philadelphia to Seattle

Explore current cheapest deals departing from Philadelphia to Seattle

2026-11-09 – 2026-11-15
PHL - Seattle
81% AI deal score
$313
$243
Round trip
2026-11-10 – 2026-11-18
PHL - Seattle
75% AI deal score
$304
$254
Round trip
2026-10-14 – 2026-10-16
PHL - Seattle
81% AI deal score
$367
$267
Round trip
2026-10-22 – 2026-10-25
PHL - Seattle
81% AI deal score
$367
$267
Round trip
2026-12-05 – 2026-12-08
PHL - Seattle
79% AI deal score
$354
$271
Round trip
2026-11-04 – 2026-11-10
PHL - Seattle
74% AI deal score
$312
$272
Round trip
2026-11-11 – 2026-11-14
PHL - Seattle
75% AI deal score
$327
$272
Round trip
2026-10-12 – 2026-10-19
PHL - Seattle
75% AI deal score
$349
$275
Round trip
2026-10-10 – 2026-10-16
PHL - Seattle
75% AI deal score
$349
$276
Round trip
2026-10-17 – 2026-10-19
PHL - Seattle
80% AI deal score
$366
$276
Round trip

Philadelphia to Seattle: Overview

Insights for flights from Philadelphia to Seattle

For 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 fare of $329. Planning your trip during these months can lead to more favorable pricing.

Right now, fares from Philadelphia to Seattle are typically $494–$1016, with a median of $710. Current fares are below the typical level, and about 5% of recent fares were classified as a good price. New deals appear almost daily, suggesting frequent opportunities to find competitive prices.

A typical journey from Philadelphia to Seattle takes about 5h 59m, including connections. Given that most itineraries connect at least once, this duration reflects the overall travel time. For connecting itineraries specifically, the median travel time is 25h 44m, while direct flights have a median duration of 5h 59m.

The route from Philadelphia to Seattle covers a distance of 3818 km, classifying it as a medium-haul journey. This distance means you are traveling a significant but not extremely long distance, often involving several hours in the air.

How much is a round trip from Philadelphia to Seattle

Regular price: $263 - $355

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

The regular price range for flights from Philadelphia to Seattle is $263 to $355. The current lowest deal is $243 with Frontier Airlines for travel from Nov 9-Nov 15.

now $243

Low $263

High $355

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

Mon, Sep 14

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

$664

$503

One-way

Mon, Sep 14

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

$586

$518

One-way

Mon, Sep 14

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Southwest Airlines

$667

$523

One-way

Tue, Sep 15

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

United Airlines

$543

$413

One-way

Tue, Sep 15

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

$655

$498

One-way

Tue, Sep 15

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

$664

$518

One-way

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

2 nights

Sep 16 - Sep 18

$664 → $518

22%

1 night

Sep 16 - Sep 17

$667 → $523

22%

3 nights

Sep 15 - Sep 18

$655 → $518

21%

1 night

Sep 18 - Sep 19

$645 → $513

20%

Popular Airports to fly from Philadelphia to Seattle

Philadelphia - Seattle route insights

💸 Price insights

Recent fares are below the typical level.

Recent fares from PHL to SEA are below the typical level for this route.

📅 Best time to fly

Fly in February for the best prices.

Historically, February ($195), May ($228), and September ($329) offer the lowest median fares.

⏱️ Flight duration

Direct flights take 5h 59m.

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

✈️ Airlines & availability

Connecting flights are dominant.

Only 15.4% of recent flights are direct, with connecting routes having 2 stopovers.

🏆 Airline highlight

Frontier Airlines offers a recent deal.

A recent deal was found on Frontier Airlines for $243 from November 9-15.

🎯 Booking tip

Deals are frequent on this route.

Deals for flights from Philadelphia to Seattle are frequently available within a 30-day window.

Philadelphia main airports to depart from

Philadelphia International (PHL)

Cheapest

Philadelphia International Airport is a convenient option for flights from Philadelphia to Seattle.

📍 ~11 km from city center (reachable by car or train)

💸 Flights from ~$279

Seattle main airports to arrive at

Seattle–Tacoma International (SEA)

Cheapest

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

📍 ~18 km from city center (reachable by car)

💸 Flights from ~$296

Airports nearby Seattle used as alternative

Paine Field Everett (PAE)

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

📍 ~40 km from Seattle (reachable by car)

💸 Flights from ~$377

Business & First Class Flight Deals to Seattle

Discover luxury on the budget with premium cabin class on flights from Philadelphia to Seattle.

Elite

Best Elite deals to Seattle

Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.

From PHL

Elite

Sep 22

Seattle, United States

88% AI deal score

$1,676

$1,138

Save $538

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Sep 26

Seattle, United States

87% AI deal score

$1,610

$1,138

Save $472

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Sep 29

Seattle, United States

86% AI deal score

$1,516

$1,138

Save $378

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Sep 22

Seattle, United States

85% AI deal score

$1,592

$1,228

Save $364

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Oct 21

Seattle, United States

80% AI deal score

$1,407

$1,125

Save $282

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Oct 17

Seattle, United States

80% AI deal score

$1,384

$1,130

Save $254

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Oct 13

Seattle, United States

80% AI deal score

$1,392

$1,138

Save $254

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Oct 10

Seattle, United States

80% AI deal score

$1,397

$1,138

Save $259

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Dec 12

Seattle, United States

80% AI deal score

$1,441

$1,164

Save $277

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Sep 29

Seattle, United States

80% AI deal score

$1,462

$1,178

Save $284

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Oct 13

Seattle, United States

79% AI deal score

$1,324

$1,125

Save $199

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Oct 07

Seattle, United States

79% AI deal score

$1,350

$1,130

Save $220

Alaska Airlines, Inc.

Business Class

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 was around $551. Booking 0-6 days out saw prices rise to an average of $837, while booking 60+ days in advance resulted in the highest average price of $1250 across the trailing quarter.

Based on historical data from the trailing 90 days, 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 typically started to increase significantly above the $494 threshold, with 75% of fares being $1016 or higher.

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

Related routes

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Flights to Seattle from other cities

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Philadelphia to Seattle: Overview

Insights for flights from Philadelphia to Seattle

How much is a round trip from Philadelphia to Seattle

Regular price: $263 - $355

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

The regular price range for flights from Philadelphia to Seattle is $263 to $355. The current lowest deal is $243 with Frontier Airlines for travel from Nov 9-Nov 15.

now $243

Low $263

High $355

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

Mon, Sep 14

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

$664

$503

One-way

Mon, Sep 14

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

$586

$518

One-way

Mon, Sep 14

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Southwest Airlines

$667

$523

One-way

Tue, Sep 15

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

United Airlines

$543

$413

One-way

Tue, Sep 15

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

$655

$498

One-way

Tue, Sep 15

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

$664

$518

One-way

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

2 nights

Sep 16 - Sep 18

$664 → $518

22%

1 night

Sep 16 - Sep 17

$667 → $523

22%

3 nights

Sep 15 - Sep 18

$655 → $518

21%

1 night

Sep 18 - Sep 19

$645 → $513

20%

Popular Airports to fly from Philadelphia to Seattle

Philadelphia - Seattle route insights

💸 Price insights

Recent fares are below the typical level.

Recent fares from PHL to SEA are below the typical level for this route.

📅 Best time to fly

Fly in February for the best prices.

Historically, February ($195), May ($228), and September ($329) offer the lowest median fares.

⏱️ Flight duration

Direct flights take 5h 59m.

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

✈️ Airlines & availability

Connecting flights are dominant.

Only 15.4% of recent flights are direct, with connecting routes having 2 stopovers.

🏆 Airline highlight

Frontier Airlines offers a recent deal.

A recent deal was found on Frontier Airlines for $243 from November 9-15.

🎯 Booking tip

Deals are frequent on this route.

Deals for flights from Philadelphia to Seattle are frequently available within a 30-day window.

Philadelphia main airports to depart from

Philadelphia International (PHL)

Cheapest

Philadelphia International Airport is a convenient option for flights from Philadelphia to Seattle.

📍 ~11 km from city center (reachable by car or train)

💸 Flights from ~$279

Seattle main airports to arrive at

Seattle–Tacoma International (SEA)

Cheapest

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

📍 ~18 km from city center (reachable by car)

💸 Flights from ~$296

Airports nearby Seattle used as alternative

Paine Field Everett (PAE)

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

Seattle, United States

79% AI deal score

$1,350

$1,130

Save $220

Alaska Airlines, Inc.

Business Class

Frequently Asked Questions About Flights to Seattle

Cheap Flights from Philadelphia to Seattle

Today’s best flight deals from Philadelphia to Seattle

Philadelphia to Seattle: Overview

Insights for flights from Philadelphia to Seattle

How much is a round trip from Philadelphia to Seattle

The cheapest time to fly from Philadelphia to Seattle

Direct flights from Philadelphia to Seattle

Last-minute flights going from Philadelphia to Seattle

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

Popular Airports to fly from Philadelphia to Seattle

Philadelphia - Seattle route insights

Recent fares are below the typical level.

Fly in February for the best prices.

Direct flights take 5h 59m.

Connecting flights are dominant.

Frontier Airlines offers a recent deal.

Deals are frequent on this route.

Philadelphia main airports to depart from

Seattle main airports to arrive at

Airports nearby Seattle used as alternative

Business & First Class Flight Deals to Seattle

Best Elite deals to Seattle

Sep 22

Sep 26

Sep 29

Sep 22

Oct 21

Oct 17

Oct 13

Oct 10

Dec 12

Sep 29

Oct 13

Oct 07

Frequently Asked Questions About Flights to Seattle

How far in advance should I book a flight from Philadelphia to Seattle?

What's a cheap fare from Philadelphia to Seattle?

What's the best month to fly from Philadelphia to Seattle?

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

How long is the flight from Philadelphia to Seattle?

How often do Philadelphia to Seattle flight prices drop?

Related routes

More routes from Philadelphia

Flights to Seattle from other cities

Philadelphia to Seattle: Overview

Insights for flights from Philadelphia to Seattle

How much is a round trip from Philadelphia to Seattle

The cheapest time to fly from Philadelphia to Seattle

Direct flights from Philadelphia to Seattle

Last-minute flights going from Philadelphia to Seattle

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

Popular Airports to fly from Philadelphia to Seattle

Philadelphia - Seattle route insights

Recent fares are below the typical level.

Fly in February for the best prices.

Direct flights take 5h 59m.

Connecting flights are dominant.

Frontier Airlines offers a recent deal.

Deals are frequent on this route.

Philadelphia main airports to depart from

Seattle main airports to arrive at

Airports nearby Seattle used as alternative

Business & First Class Flight Deals to Seattle

Best Elite deals to Seattle

Sep 22

Sep 26

Sep 29

Sep 22

Oct 21

Oct 17

Oct 13

Oct 10

Dec 12

Sep 29

Oct 13

Oct 07

Frequently Asked Questions About Flights to Seattle

How far in advance should I book a flight from Philadelphia to Seattle?

What's a cheap fare from Philadelphia to Seattle?

What's the best month to fly from Philadelphia to Seattle?