Flights from Seattle to Philadelphia
North AmericaYear-round

Cheap Flights from Seattle to Philadelphia

Track economy fares on the SEA → PHL route and get alerts when prices drop.

From
Seattle
SEA
To
Philadelphia
PHL

Route Intelligence: Seattle → Philadelphia

Flight Duration

5 hr 29 min (Direct)

Price Guidance

A good deal is under $250 roundtrip. Standard fare is $350–$500+.

Peak Season

Jun-Aug

Top Airlines

Delta Air Lines, American Airlines, Alaska Airlines

Booking Tip

Book 1-3 months in advance for the best domestic fares.

Track Seattle → Philadelphia Fares

Set your target price and FlightKitten will scan this route twice daily. The instant economy fares drop below your budget, you'll get an email with the price, airline, and a direct booking link.

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Route Summary: Seattle → Philadelphia

From
Seattle (SEA)
To
Philadelphia (PHL)
Duration
5 hr 29 min (Direct)
Airlines
Delta Air Lines, American Airlines, Alaska Airlines
Price Guide
A good deal is under $250 roundtrip. Standard fare is $350–$500+.
Tracking
FlightKitten scans 220+ airlines 2× daily
220+
Airlines Monitored
2×
Daily Scanning
AI
Deal Briefings
7-Day
Free Trial
Premium Cabin

Prefer business class on this route?

CEOFLIGHTSon board with your vision

Everyone deserves comfort at an affordable price. CEOFLIGHTS Personal Travel Managers find you the best business class fares and handle every detail of your journey.

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Also available: BestBusinessClass.com

Other Routes to Philadelphia

New York→PhiladelphiaLos Angeles→PhiladelphiaChicago→PhiladelphiaMiami→PhiladelphiaSan Francisco→PhiladelphiaBoston→Philadelphia

More Destinations in North America

Anchorage
Anchorage
Atlanta
Atlanta
Austin
Austin
Boston
Boston
Charleston
Charleston
Charlotte
Charlotte

Route Briefing: Seattle to Philadelphia

Flying from Seattle to Philadelphia takes 5 hours and 10 minutes across 2,378 miles. American Airlines and Alaska Airlines operate daily nonstops between SEA and Philadelphia International Airport (PHL).

Philadelphia is an incredible historic walking city brimming with revolutionary heritage, world-class art, and iconic food. Explore Independence Hall and the Liberty Bell in Old City, view world-class Impressionist art at the Barnes Foundation, and climb the famous steps of the Philadelphia Museum of Art. For lunch, grab a roast pork sandwich with sharp provolone at Tommy DiNic's inside Reading Terminal Market, or explore the trendy cafes and gastropubs of Fishtown.

Economy roundtrips under $150 are a great deal on this route, with standard fares sitting between $230 and $360. Summer brings outdoor riverfront festivals and historic walking tours. Book 4 to 6 weeks in advance for the lowest economy rates.

How much are flights from Seattle to Philadelphia in 2026?

Flight prices from Seattle (SEA) to Philadelphia (PHL) vary significantly depending on the season, day of the week, and how far in advance you book. A good deal is under $250 roundtrip. Standard fare is $350–$500+. Popular carriers on this route include Delta Air Lines, American Airlines, Alaska Airlines. FlightKitten eliminates the guesswork by monitoring 220+ airlines twice daily and alerting you the moment economy fares hit your target price.

How does FlightKitten track Seattle to Philadelphia fares?

FlightKitten is an economy flight price monitoring platform that scans 220+ airlines twice every day for economy fares on the SEA to PHL route. When you set a target price, FlightKitten continuously monitors this route and sends an email alert the moment fares drop below your budget. Each alert includes the exact fare, airline, dates, and an AI-powered briefing that explains whether the deal is genuinely good compared to historical pricing on this route. No more obsessive price checking — set your budget and let FlightKitten do the watching. Learn more about how FlightKitten tracking works.

See our full Philadelphia destination guide for all available routes. Also popular: Seattle to Anchorage.

Pro tip: Book 1-3 months in advance for the best domestic fares.

Looking for business class on this route? CEOFLIGHTS pairs you with a Personal Travel Manager who finds affordable business class fares and handles every detail of your journey. Alternatively, BestBusinessClass.com offers free expert quotes with real savings.