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

In the trailing 90 days, approximately 15.4% of flights from Philadelphia to Seattle were non-stop. For flights requiring connections, travelers typically experienced a median of 2 stopovers. This indicates that direct options are less common for this route.

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 generally have a median duration of 9 hours and 55 minutes. This represents a significant difference in travel time between direct and connecting options.

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 for lower fares. Monitoring prices across the trailing 30 days could reveal these fluctuations.

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 2 days ago

451 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Aug 17, 2026.)

Today’s best flight deals from Philadelphia to Seattle

Explore current cheapest deals departing from Philadelphia to Seattle

2026-10-14 – 2026-10-21
PHL - Seattle
85% AI deal score
$354
$223
Round trip
2026-09-15 – 2026-09-16
PHL - Seattle
88% AI deal score
$405
$248
Round trip
2026-12-08 – 2026-12-12
PHL - Seattle
88% AI deal score
$401
$248
Round trip
2027-01-23 – 2027-01-30
PHL - Seattle
84% AI deal score
$321
$248
Round trip
2026-09-14 – 2026-09-18
PHL - Seattle
85% AI deal score
$406
$251
Round trip
2026-09-01 – 2026-09-04
PHL - Seattle
85% AI deal score
$432
$258
Round trip
2026-09-01 – 2026-09-19
PHL - Seattle
80% AI deal score
$338
$258
Round trip
2026-10-21 – 2026-10-30
PHL - Seattle
84% AI deal score
$341
$259
Round trip
2026-10-20 – 2026-10-23
PHL - Seattle
82% AI deal score
$370
$259
Round trip
2026-08-18 – 2026-08-26
PHL - Seattle
85% AI deal score
$616
$276
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 fare of $329. These months present the best opportunities for finding lower prices on this route.

Right now, fares for flights 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 for this route, suggesting frequent opportunities to find competitive pricing.

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

The route from Philadelphia to Seattle covers a distance of 3818 kilometers. This classifies it as a medium-haul journey, meaning it's a significant distance but generally manageable within a single travel day, even with connections. Most itineraries on this route connect at least once, with the typical connecting itinerary involving 2 stopovers. Only 15.4% of recent fares were for non-stop flights.

How much is a round trip from Philadelphia to Seattle

Regular price: $286 - $500

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

The regular price range for flights from Philadelphia to Seattle is $286 to $500. The current lowest deal is $223 with Frontier Airlines for travel from Oct 14-Oct 21.

now $223

Low $286

High $500

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. Prices are generally 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, Aug 17

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$602

$320

One-way

Mon, Aug 17

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$823

$320

One-way

Mon, Aug 17

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$659

$402

One-way

Tue, Aug 18

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$616

$276

One-way

Tue, Aug 18

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$823

$276

One-way

Tue, Aug 18

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$657

$277

One-way

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

1 night

Aug 18 - Aug 19

$823 → $276

66%

4 nights

Aug 22 - Aug 26

$768 → $276

64%

3 nights

Aug 18 - Aug 21

$799 → $319

60%

2 nights

Aug 22 - Aug 24

$791 → $319

60%

Popular Airports to fly from Philadelphia to Seattle

Philadelphia - Seattle route insights

💸 Price insights

Recent fares are below the typical level.

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

📅 Best time to fly

Fly in February for the lowest median prices.

Historically, February offers the lowest median prices at $195, followed by May at $228.

⏱️ Flight duration

Direct flights take 5h 59m; connecting flights take 25h 44m.

The median flight duration for direct routes is 5h 59m, while connecting flights average 25h 44m.

✈️ Airlines & availability

Connecting flights are dominant for this route.

Connecting flights make up 84.6% of routes, with a median of 2 stopovers when connecting.

🏆 Airline highlight

Alaska Airlines, Inc. offers direct flights.

Alaska Airlines, Inc. provides direct flight options on this route from Philadelphia to Seattle.

🎯 Booking tip

Deals are frequent on this route.

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

Philadelphia main airports to depart from

Philadelphia International (PHL)

Cheapest

Philadelphia International Airport is a good option 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 airport for flights from Philadelphia.

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

💸 Flights from ~$230

Airports nearby Seattle used as alternative

Paine Field Everett (PAE)

Paine Field Everett is a closer alternative for travelers in North Seattle or Snohomish County, offering less congestion.

📍 ~40 km from Seattle (reachable by car)

💸 Flights from ~$351

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 01

Seattle, United States

87% AI deal score

$1,516

$1,118

Save $398

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Aug 29

Seattle, United States

87% AI deal score

$1,572

$1,158

Save $414

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Sep 02

Seattle, United States

86% AI deal score

$1,449

$1,118

Save $331

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Sep 26

Seattle, United States

86% AI deal score

$1,455

$1,118

Save $337

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Sep 26

Seattle, United States

86% AI deal score

$1,477

$1,124

Save $353

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Sep 17

Seattle, United States

86% AI deal score

$1,477

$1,124

Save $353

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Aug 26

Seattle, United States

86% AI deal score

$1,496

$1,158

Save $338

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Aug 26

Seattle, United States

86% AI deal score

$1,500

$1,158

Save $342

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Aug 25

Seattle, United States

86% AI deal score

$1,502

$1,158

Save $344

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Aug 25

Seattle, United States

86% AI deal score

$1,500

$1,158

Save $342

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Aug 29

Seattle, United States

86% AI deal score

$1,524

$1,158

Save $366

Alaska Airlines, Inc.

Business Class

From PHL

Elite

Sep 02

Seattle, United States

85% AI deal score

$1,442

$1,118

Save $324

Alaska Airlines, Inc.

Business Class

Frequently Asked Questions About Flights to Seattle

Historically, the lowest average prices for flights from Philadelphia to Seattle are found when booking 7-13 days prior to departure. During the trailing 90 days, the average price for this booking window was $551. In contrast, booking 0-6 days out typically resulted in an average price of $837, while booking 60+ days in advance saw prices average around $1250.

Across the trailing quarter, a good price for a flight from Philadelphia to Seattle was considered to be $494 or less. The median price for this route over the same 90-day period was $710. Prices typically ranged up to $1016 for the higher end of fares.

Historically, February has been one of the cheapest months to fly from Philadelphia to Seattle, with a median price of $195. May also offered favorable pricing, with a median of $228. The annual median price for this route was $710, indicating significant savings are possible by selecting specific travel months.

Related routes

More routes from Philadelphia

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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: $286 - $500

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

The regular price range for flights from Philadelphia to Seattle is $286 to $500. The current lowest deal is $223 with Frontier Airlines for travel from Oct 14-Oct 21.

now $223

Low $286

High $500

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, Aug 17

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$602

$320

One-way

Mon, Aug 17

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$823

$320

One-way

Mon, Aug 17

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$659

$402

One-way

Tue, Aug 18

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$616

$276

One-way

Tue, Aug 18

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$823

$276

One-way

Tue, Aug 18

⌛ Last-Minute

PHL - Seattle

Philadelphia (PHL) - Seattle (SEA)

Frontier Airlines

$657

$277

One-way

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

1 night

Aug 18 - Aug 19

$823 → $276

66%

4 nights

Aug 22 - Aug 26

$768 → $276

64%

3 nights

Aug 18 - Aug 21

$799 → $319

60%

2 nights

Aug 22 - Aug 24

$791 → $319

60%

Popular Airports to fly from Philadelphia to Seattle

Philadelphia - Seattle route insights

💸 Price insights

Recent fares are below the typical level.

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

📅 Best time to fly

Fly in February for the lowest median prices.

Historically, February offers the lowest median prices at $195, followed by May at $228.

⏱️ Flight duration

Direct flights take 5h 59m; connecting flights take 25h 44m.

The median flight duration for direct routes is 5h 59m, while connecting flights average 25h 44m.

✈️ Airlines & availability

Connecting flights are dominant for this route.

Connecting flights make up 84.6% of routes, with a median of 2 stopovers when connecting.

🏆 Airline highlight

Alaska Airlines, Inc. offers direct flights.

Alaska Airlines, Inc. provides direct flight options on this route from Philadelphia to Seattle.

🎯 Booking tip

Deals are frequent on this route.

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

Philadelphia main airports to depart from

Philadelphia International (PHL)

Cheapest

Philadelphia International Airport is a good option 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 airport for flights from Philadelphia.

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

💸 Flights from ~$230

Airports nearby Seattle used as alternative

Paine Field Everett (PAE)

Paine Field Everett is a closer alternative for travelers in North Seattle or Snohomish County, offering less congestion.

Seattle, United States

85% AI deal score

$1,442

$1,118

Save $324

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 lowest median prices.

Direct flights take 5h 59m; connecting flights take 25h 44m.

Connecting flights are dominant for this route.

Alaska Airlines, Inc. offers direct flights.

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 01

Aug 29

Sep 02

Sep 26

Sep 26

Sep 17

Aug 26

Aug 26

Aug 25

Aug 25

Aug 29

Sep 02

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 lowest median prices.

Direct flights take 5h 59m; connecting flights take 25h 44m.

Connecting flights are dominant for this route.

Alaska Airlines, Inc. offers direct flights.

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 01

Aug 29

Sep 02

Sep 26

Sep 26

Sep 17

Aug 26

Aug 26

Aug 25

Aug 25

Aug 29

Sep 02

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?