Seattle (SEA) → Philadelphia (PHL)

3,817 km
5h 16m flight
From $430
Philadelphia destination photo

About Seattle to Philadelphia Flights

Discover the best flights from Seattle to Philadelphia, covering 3,817 km in approximately 5h 16m. Seattle (SEA) to Philadelphia (PHL) is one of the popular medium-haul routes within United States. With 4 major airlines operating this route including direct flights, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Seattle to Philadelphia.

12-Month Price History

Flight prices from Seattle to Philadelphia vary significantly throughout the year. February typically offers the best deals with average prices around $576, while July sees the highest prices, averaging $963. Savvy travelers can save up to 40% by choosing their travel dates wisely.

Best Time to Fly

Cheapest Month

February

Save up to 40% on average

Most Expensive

July

Peak season pricing

Book in Advance

32 days

For best prices

Booking Tips

For the best prices on Seattle to Philadelphia flights, we recommend booking 57 days in advance. Domestic flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.

Airlines Serving This Route

UPS Airlines

5X

Economy

$800

Business

$3650

First

$4930

Piedmont Airlines

PT

Economy

$800

Business

$3500

First

$5140

Alaska Airlines

AS

Economy

$1020

Business

$2990

First

$5120

Delta Air Lines

DL

Economy

$1030

Business

$2950

First

$5600

Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.

Alternative Flight Options

New York destination photo

SeattleNew York

Seattle-Tacoma International (SEA) to John F. Kennedy International (JFK)

Distance: 3,887 km

Average price: $683

View this route →
Newark destination photo

SeattleNewark

Seattle-Tacoma International (SEA) to Newark Liberty International (EWR)

Distance: 3,855 km

Average price: $678

View this route →
Washington destination photo

SeattleWashington

Seattle-Tacoma International (SEA) to Ronald Reagan Washington National (DCA)

Distance: 3,738 km

Average price: $661

View this route →

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Frequently Asked Questions

How long is the flight from Seattle to Philadelphia?

The flight time from Seattle (SEA) to Philadelphia (PHL) is approximately 5 hours and 16 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.

What is the distance between Seattle and Philadelphia?

The aerial distance between Seattle and Philadelphia is 3,817 kilometers (2,372 miles). This is the straight-line distance, which is used to calculate flight times.

Which airlines fly from Seattle to Philadelphia?

Several airlines operate flights between Seattle and Philadelphia, including Delta Air Lines, Alaska Airlines, Piedmont Airlines and 1 more airlines. Direct flights are available on this route.

What is the cheapest month to fly from Seattle to Philadelphia?

Based on historical data, February typically offers the lowest airfares for flights from Seattle to Philadelphia. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.

How far in advance should I book my flight to Philadelphia?

For the best prices on Seattle to Philadelphia flights, we recommend booking 76 days in advance. Domestic flights can sometimes offer good last-minute deals, but advance booking is usually cheaper.

Do I need a visa to travel from Seattle to Philadelphia?

Visa requirements depend on your nationality and the purpose of your visit. Since this is a domestic flight, no visa is required for citizens.

What is the time difference between Seattle and Philadelphia?

Seattle operates on America/Los_Angeles time zone, while Philadelphia is in the America/New_York time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.