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

Across the trailing 90 days, approximately 13.1% of flights from Seattle to Philadelphia are non-stop. For flights that include stopovers, the median number of stopovers is typically 2. This indicates that while direct options are available, a significant portion of routes will involve at least one connection. Travelers should consider this when planning their journey.

How long does it take to fly from Seattle to Philadelphia?

A direct flight from Seattle to Philadelphia typically takes approximately 5 hours and 13 minutes, covering a distance of 3818 kilometers. For flights with one stop, the median duration is considerably longer, averaging around 11 hours and 19 minutes. Travelers should account for these differences in flight time when making their travel plans to Philadelphia.

Are there frequently good prices on flights from Seattle to Philadelphia?

Historically, good prices on flights from Seattle to Philadelphia have been frequent across the trailing 30 days. This indicates that travelers often have opportunities to find favorable deals for this route. While specific prices fluctuate, the route consistently offers competitive options for those planning their travel.

Flights From Seattle

To Philadelphia

Cheap Flights from Seattle to Philadelphia

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

Deals from

Seattle

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

Prices updated 1 day ago

462 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 15, 2026.)

Today’s best flight deals from Seattle to Philadelphia

Explore current cheapest deals departing from Seattle to Philadelphia

2026-10-02 – 2026-10-13
SEA - Philadelphia
72% AI deal score
$242
$225
Round trip
2026-10-20 – 2026-11-03
SEA - Philadelphia
68% AI deal score
$237
$262
Round trip
2026-10-31 – 2026-11-03
SEA - Philadelphia
71% AI deal score
$277
$263
Round trip
2026-10-20 – 2026-11-17
SEA - Philadelphia
68% AI deal score
$227
$264
Round trip
2026-10-31 – 2026-11-17
SEA - Philadelphia
68% AI deal score
$231
$265
Round trip
2026-10-20 – 2026-10-27
SEA - Philadelphia
69% AI deal score
$263
$265
Round trip
2026-10-09 – 2026-10-23
SEA - Philadelphia
68% AI deal score
$237
$266
Round trip
2026-10-31 – 2026-11-10
SEA - Philadelphia
68% AI deal score
$243
$266
Round trip
2026-10-23 – 2026-10-26
SEA - Philadelphia
70% AI deal score
$277
$267
Round trip
2026-10-23 – 2026-10-25
SEA - Philadelphia
70% AI deal score
$277
$267
Round trip

Seattle to Philadelphia: Overview

Insights for flights from Seattle to Philadelphia

A typical journey from Seattle to Philadelphia takes about 5h 13m, including connections. This route is classified as medium-haul, covering a distance of 3818 kilometers. Given that most itineraries for this route involve connections, the median connecting flight time is 13h 45m, while non-stop flights also take 5h 13m.

For travelers looking for cheap flights from Seattle to Philadelphia, right now fares are below the typical level. Prices for this route typically range from $453–$1047, with a median of $695. Currently, only 4% of recent fares are classified as a good price, indicating that finding a particularly low fare might require some flexibility. New deals for this route appear almost daily, so setting up a price alert can be beneficial.

When is the cheapest time to fly from Seattle to Philadelphia? The data indicates that May is often the most affordable month, with a median fare of $323. Other cost-effective months include November and April, both with median fares of $327. Planning your trip during these months could lead to more favorable prices.

For direct flights from Seattle to Philadelphia, only 13.1% of recent itineraries are non-stop. This means that most itineraries connect at least once, with the typical number of connections being 2. Travelers should account for these connections when planning their journey and overall travel time.

How much is a round trip from Seattle to Philadelphia

Regular price: $209 - $363

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

The regular price range for this route is $209 to $363. The current lowest deal is $225 with Frontier Airlines, for travel from Oct 2-Oct 13.

now $225

Low $209

High $363

The cheapest time to fly from Seattle to Philadelphia

The cheapest month to fly from Seattle to Philadelphia is November, with a median price of $327. The most expensive month is June, with a median price of $810. Prices are generally lower from February to December.

November

Cheapest

Flights from $327

June

Most Expensive

Flights from $810

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Seattle to Philadelphia

Alaska Airlines, Inc.

Last-minute flights going from Seattle to Philadelphia

Tue, Sep 15

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$281

$379

One-way

Tue, Sep 15

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$276

$380

One-way

Wed, Sep 16

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

United Airlines

$526

$432

One-way

Sat, Sep 19

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$278

$379

One-way

Sat, Sep 19

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$399

$411

One-way

Sat, Sep 19

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$396

$415

One-way

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

7 nights

Dec 30 - Jan 6

$455 → $399

12%

7 nights

Dec 29 - Jan 5

$452 → $399

12%

11 nights

Oct 2 - Oct 13

$242 → $226

7 nights

Dec 8 - Dec 15

$412 → $399

Popular Airports to fly from Seattle to Philadelphia

Seattle - Philadelphia route insights

💸 Price insights

Recent fares are below the typical level.

Recent fares for Seattle to Philadelphia are below the typical level, with a median of $695.

📅 Best time to fly

Fly in May for the lowest median prices.

Historically, May offers the lowest median prices at $323, followed by November and April.

⏱️ Flight duration

Direct flights average 5h 13m.

Direct flights from Seattle to Philadelphia typically average 5h 13m, connecting flights 13h 45m.

✈️ Airlines & availability

Connecting flights are dominant on this route.

Only 13.1% of recent fares are direct, with connecting flights having a median of 2 stopovers.

🏆 Airline highlight

Frontier Airlines offers a recent deal for $225.

A recent deal from Frontier Airlines was found for $225, departing October 2 and returning October 13.

🎯 Booking tip

Deals are frequent for this route.

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

Seattle main airports to depart from

Seattle–Tacoma International (SEA)

Cheapest

Seattle–Tacoma International Airport is the cheapest option for flights from Seattle to Philadelphia.

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

💸 Flights from ~$253

Philadelphia main airports to arrive at

Philadelphia International (PHL)

Cheapest

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

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

💸 Flights from ~$253

Airports nearby Philadelphia used as alternative

Newark Liberty International (EWR)

Cheapest

Consider EWR for a vast network of domestic and global destinations, often with competitive pricing and direct flights.

📍 ~135 km from Philadelphia (reachable by rail)

💸 Flights from ~$297

Business & First Class Flight Deals to Philadelphia

$1,269

Save $538

Alaska Airlines, Inc.

Business Class

Frequently Asked Questions About Flights to Philadelphia

Historically, the best time to book flights from Seattle to Philadelphia is typically within 0-6 days of departure, with an average price of $400. Booking 7-13 days out sees an average price of $478. Prices tend to be significantly higher further out, for example, 14-27 days before departure, the average price rises to $1680. Across the trailing quarter, prices can fluctuate considerably based on how far in advance you book.

Across the trailing 90 days, a flight from Seattle to Philadelphia is considered a good deal if it is priced at or below $453. The median price for this route historically has been around $695. Prices can go higher, with 75% of prices observed being $1047 or less. Therefore, aiming for a price below $453 is generally advisable for a cost-effective trip.

Historically, the cheapest months to fly from Seattle to Philadelphia include May, November, and April. During these months, the median prices are around $323 for May and $327 for both November and April. This is significantly lower than the annual median price of $695 for this route. Travelers looking for the most economical options should consider these months for their journeys.

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Flights to Philadelphia from other cities

Flights from Atlanta to Philadelphia Flights from Austin to Philadelphia Flights from Barcelona to Philadelphia Flights from Belfast to Philadelphia Flights from Boston to Philadelphia Flights from Chicago to Philadelphia Flights from Nashville to Philadelphia Flights from Ottawa to Philadelphia Flights from San Francisco to Philadelphia Flights from Singapore to Philadelphia Flights from Tampa to Philadelphia Flights from Toronto to Philadelphia

Seattle to Philadelphia: Overview

Insights for flights from Seattle to Philadelphia

How much is a round trip from Seattle to Philadelphia

Regular price: $209 - $363

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

The regular price range for this route is $209 to $363. The current lowest deal is $225 with Frontier Airlines, for travel from Oct 2-Oct 13.

now $225

Low $209

High $363

The cheapest time to fly from Seattle to Philadelphia

November

Cheapest

Flights from $327

June

Most Expensive

Flights from $810

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Seattle to Philadelphia

Alaska Airlines, Inc.

Last-minute flights going from Seattle to Philadelphia

Tue, Sep 15

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$281

$379

One-way

Tue, Sep 15

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$276

$380

One-way

Wed, Sep 16

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

United Airlines

$526

$432

One-way

Sat, Sep 19

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$278

$379

One-way

Sat, Sep 19

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$399

$411

One-way

Sat, Sep 19

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Alaska Airlines, Inc.

$396

$415

One-way

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

7 nights

Dec 30 - Jan 6

$455 → $399

12%

7 nights

Dec 29 - Jan 5

$452 → $399

12%

11 nights

Oct 2 - Oct 13

$242 → $226

7 nights

Dec 8 - Dec 15

$412 → $399

Popular Airports to fly from Seattle to Philadelphia