Direct (nonstop) flights from Seattle to Philadelphia

3 airlines fly nonstop from Seattle Tacoma International (SEA) to Philadelphia International Airport (PHL). It's 2,377 miles (3,826 km), about 5h 14m in the air. Operated by American Airlines, Alaska Airlines, Delta Air Lines.

SEA
Seattle Tacoma International
🇺🇸 Seattle, USA
PHL
Philadelphia International Airport
🇺🇸 Philadelphia, USA
Flight Time
5h 14m
Distance
2,377 mi
3,826 km
CO₂/pax
402 kg
−40 kg vs. layover
Airlines
3
American Airlines +2
Time Diff
+3h
Operated by American Airlines American Airlines Alaska Airlines Alaska Airlines Delta Air Lines Delta Air Lines

Route data last updated: May 30, 2026

Airlines with non-stop flights

American Airlines AA American Airlines
Route
SEA → PHL
Flight Time
5h 14m
Distance
2,377 mi
Alaska Airlines AS Alaska Airlines
Route
SEA → PHL
Flight Time
5h 14m
Distance
2,377 mi
Delta Air Lines DL Delta Air Lines
Route
SEA → PHL
Flight Time
5h 14m
Distance
2,377 mi

Alternative Routes

Other ways to fly from Seattle to Philadelphia with one stop · direct emits 402 kg CO₂ per passenger

SEA MDW (Chicago) PHL
Leg 1: 3h 55m (1,733 mi) Leg 2: 1h 58m (667 mi) Total: ~5h 53m 🍃 442 kg CO₂ (+10% vs. direct)
Leg 1
SEA → MDW
3h 55m · 1,733 mi
View SEA to MDW flights →
Leg 2
MDW → PHL
1h 58m · 667 mi
View MDW to PHL flights →
SEA MSP (Minneapolis) PHL
Leg 1: 3h 22m (1,399 mi) Leg 2: 2h 33m (979 mi) Total: ~5h 55m 🍃 426 kg CO₂ (+6% vs. direct)
Leg 1
SEA → MSP
3h 22m · 1,399 mi
View SEA to MSP flights →
Leg 2
MSP → PHL
2h 33m · 979 mi
View MSP to PHL flights →
SEA DTW (Detroit) PHL
Leg 1: 4h 22m (1,926 mi) Leg 2: 1h 39m (453 mi) Total: ~6h 1m 🍃 435 kg CO₂ (+8% vs. direct)
Leg 1
SEA → DTW
4h 22m · 1,926 mi
View SEA to DTW flights →
Leg 2
DTW → PHL
1h 39m · 453 mi
View DTW to PHL flights →
SEA PIT (Pittsburgh) PHL
Leg 1: 4h 41m (2,123 mi) Leg 2: 1h 22m (268 mi) Total: ~6h 3m 🍃 434 kg CO₂ (+8% vs. direct)
Leg 1
SEA → PIT
4h 41m · 2,123 mi
View SEA to PIT flights →
Leg 2
PIT → PHL
1h 22m · 268 mi
View PIT to PHL flights →
SEA CLE (Cleveland) PHL
Leg 1: 4h 32m (2,021 mi) Leg 2: 1h 33m (362 mi) Total: ~6h 5m 🍃 433 kg CO₂ (+8% vs. direct)
Leg 1
SEA → CLE
4h 32m · 2,021 mi
View SEA to CLE flights →
Leg 2
CLE → PHL
1h 33m · 362 mi
View CLE to PHL flights →

Frequently Asked Questions

How long is the direct flight from Seattle to Philadelphia?

A nonstop flight from Seattle (SEA) to Philadelphia (PHL) takes approximately 5 hours and 14 minutes. The distance is 2,377 miles (3,826 km).

Which airlines fly nonstop from Seattle to Philadelphia?

3 airlines: American Airlines, Alaska Airlines, Delta Air Lines.

Is there a nonstop flight from Seattle to Philadelphia?

Yes. 3 airlines: American Airlines, Alaska Airlines, Delta Air Lines.

How far is Seattle from Philadelphia?

The flight distance from Seattle to Philadelphia is 2,377 miles (3,826 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Los Angeles.

What type of aircraft flies from Seattle to Philadelphia?

At 5h 14m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.

What is the carbon footprint of a flight from Seattle to Philadelphia?

Roughly 402 kg CO2 per passenger one-way. That's about the same as driving 2,010 km.

Is the return flight from Philadelphia to Seattle also nonstop?

Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.

When is the cheapest time to fly from Seattle to Philadelphia?

Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.

How early should I arrive at Seattle Tacoma International for this flight?

1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.