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

In the trailing 90 days, approximately 13.1% of flights from Seattle to Philadelphia were non-stop. For flights that include stopovers, the median number of stopovers was 2. This suggests that while direct options are available, a significant portion of flights on this route will involve at least one connection. Travelers should anticipate that most journeys will include at least one stop.

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

The typical direct flight from Seattle to Philadelphia has a median duration of 5 hours and 13 minutes. For flights with one stop, the median travel time increases significantly to 11 hours and 19 minutes. This route covers an approximate distance of 3818 kilometers. Travelers should factor in these duration differences when planning their journey, as connecting flights can more than double the travel time.

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

Historically, good prices on flights from Seattle to Philadelphia have been frequent. This route is classified as one with regular opportunities for favorable fares. Travelers can typically expect to find competitive pricing when searching for flights between these two cities. The consistent availability of good prices makes this a reliable route for budget-conscious travelers.

Flights From Seattle

To Philadelphia

Cheap Flights from Seattle to Philadelphia

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Deals from

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

Prices updated 2 days ago

405 airlines compared

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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 Seattle to Philadelphia

Explore current cheapest deals departing from Seattle to Philadelphia

2026-08-25 – 2026-08-31
SEA - Philadelphia
87% AI deal score
$302
$178
Round trip
2026-08-26 – 2026-08-31
SEA - Philadelphia
88% AI deal score
$312
$178
Round trip
2026-08-19 – 2026-08-31
SEA - Philadelphia
86% AI deal score
$276
$179
Round trip
2026-08-25 – 2026-09-14
SEA - Philadelphia
85% AI deal score
$259
$180
Round trip
2026-08-25 – 2026-09-11
SEA - Philadelphia
85% AI deal score
$264
$180
Round trip
2026-08-26 – 2026-09-14
SEA - Philadelphia
85% AI deal score
$262
$180
Round trip
2026-08-26 – 2026-09-11
SEA - Philadelphia
85% AI deal score
$266
$180
Round trip
2026-08-25 – 2026-09-12
SEA - Philadelphia
85% AI deal score
$263
$181
Round trip
2026-09-24 – 2026-09-28
SEA - Philadelphia
86% AI deal score
$300
$187
Round trip
2026-09-18 – 2026-09-29
SEA - Philadelphia
80% AI deal score
$266
$216
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. Given that most itineraries on this route involve at least one stop, the median connecting flight time is significantly longer at 13h 45m, while non-stop flights also average 5h 13m. This indicates that while direct options exist, connecting flights are more common and extend the overall travel duration considerably.

For travelers looking for cheap flights from Seattle to Philadelphia, fares typically range from $453–$1047, with a median price of $695. Right now, current fares are below the typical level, and about 4% of recent fares were classified as a good price. New deals appear almost daily, suggesting frequent opportunities to find competitive pricing.

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 showing a median fare of $327. These months present the best opportunities for finding lower prices on this route.

Most itineraries for flights from Seattle to Philadelphia connect at least once, with only 13.1% of recent fares being non-stop. For those itineraries that do involve connections, the typical number of stopovers is 2. This means that if you fly this route, you should generally expect a journey with at least one intermediate stop.

The distance between Seattle and Philadelphia is approximately 3818 kilometers. This classifies the route as a medium-haul journey, which typically involves flights of several hours.

How much is a round trip from Seattle to Philadelphia

Regular price: $235 - $380

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

Regular prices for flights from Seattle to Philadelphia typically range from $235 to $380. The current lowest deal is $238 with Frontier Airlines, for travel from Aug 13-Aug 26.

now $238

Low $235

High $380

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

Sun, Jul 26

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$447

$353

One-way

Thu, Jul 30

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$443

$362

One-way

Tue, Aug 11

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$299

$275

One-way

Wed, Aug 12

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$344

$245

One-way

Wed, Aug 12

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$283

$263

One-way

Wed, Aug 12

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$324

$278

One-way

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

5 nights

Dec 10 - Dec 15

$634 → $309

51%

2 nights

Dec 4 - Dec 6

$630 → $309

51%

3 nights

Dec 10 - Dec 13

$641 → $328

49%

7 nights

Dec 7 - Dec 14

$606 → $334

45%

Popular Airports to fly from Seattle to Philadelphia

Seattle - Philadelphia route insights

💸 Price insights

Recent fares are below the typical level

Recent fares from Seattle to Philadelphia are below the typical level, with deals around $238.

📅 Best time to fly

Fly in November for the best prices

Historically, November is the cheapest month to fly, with a median price of $327.

⏱️ Flight duration

Direct flights take 5h 13m

The median flight time for a direct flight is 5 hours 13 minutes.

✈️ Airlines & availability

Connecting flights are more common

Only 13.1% of flights are direct, with connecting flights typically having 2 stopovers.

🏆 Airline highlight

Frontier Airlines offers competitive deals

Frontier Airlines recently offered a deal for $238 from Seattle to Philadelphia.

🎯 Booking tip

Deals appear frequently

Deals for flights on this route appear frequently, about every 30 days.

Seattle main airports to depart from

Seattle–Tacoma International (SEA)

Cheapest

Fly from Seattle–Tacoma International for a convenient and affordable option to Philadelphia.

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

💸 Flights from ~$231

Boeing Field (BFI)

Consider Boeing Field for flights to Philadelphia, located within Seattle.

📍 ~8 km from Seattle city center (reachable by car)

💸 Flights from ~$715

Kenmore Air Harbor Seaplane Base (LKE)

Kenmore Air Harbor Seaplane Base offers an alternative departure point from Seattle to Philadelphia.

📍 ~3 km from Seattle city center (reachable by car)

💸 Flights from ~$1453

Philadelphia main airports to arrive at

Philadelphia International (PHL)

Cheapest

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

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

💸 Flights from ~$231

Airports nearby Philadelphia used as alternative

Newark Liberty International (EWR)

Newark Liberty International offers a vast network of domestic and global destinations, often with competitive pricing.

📍 ~135 km from Philadelphia (reachable by train)

💸 Flights from ~$292

Business & First Class Flight Deals to Philadelphia

90% AI deal score

$1,678

$1,083

Save $595

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 a slightly higher average of $478. Prices tend to increase significantly for bookings made further in advance, reaching averages of $1680 for 14-27 days out and $1452 for 28-59 days out. Even bookings made 60+ days in advance are typically more expensive than last-minute options, averaging $696.

Across the trailing quarter, a good price for a flight from Seattle to Philadelphia is considered to be $453 or less. The median price for this route over the same period was $695. Prices above $1047 typically indicate a more expensive fare. By comparing potential flight costs to these historical benchmarks, travelers can identify favorable deals.

Historically, the cheapest months to fly from Seattle to Philadelphia include May, November, and April, all with a median price of approximately $323 to $327. The annual median price for this route is $695, indicating that these months offer significant savings. While November appears in the cheapest months, it also represents the most expensive month in some historical observations, suggesting price variability. Travelers looking for lower fares should consider these months based on past trends.

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Flights to Philadelphia from other cities

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Seattle to Philadelphia: Overview

Insights for flights from Seattle to Philadelphia

The distance between Seattle and Philadelphia is approximately 3818 kilometers. This classifies the route as a medium-haul journey, which typically involves flights of several hours.

How much is a round trip from Seattle to Philadelphia

Regular price: $235 - $380

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

Regular prices for flights from Seattle to Philadelphia typically range from $235 to $380. The current lowest deal is $238 with Frontier Airlines, for travel from Aug 13-Aug 26.

now $238

Low $235

High $380

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

Sun, Jul 26

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$447

$353

One-way

Thu, Jul 30

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$443

$362

One-way

Tue, Aug 11

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$299

$275

One-way

Wed, Aug 12

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$344

$245

One-way

Wed, Aug 12

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$283

$263

One-way

Wed, Aug 12

⌛ Last-Minute

SEA - Philadelphia

Seattle (SEA) - Philadelphia (PHL)

Frontier Airlines

$324

$278

One-way

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

5 nights

Dec 10 - Dec 15

$634 → $309

51%

2 nights

Dec 4 - Dec 6

$630 → $309

51%

3 nights

Dec 10 - Dec 13

$641 → $328

49%

7 nights

Dec 7 - Dec 14

$606 → $334

45%

Popular Airports to fly from Seattle to Philadelphia