C$ 240 Find Cheap Flights from Seattle to Philadelphia – Compare and Save

Among airlines operating Seattle to Philadelphia flights:

• American Airlines: offers extra legroom; offers free seat selection
• Alaska Airlines: offers extra legroom; offers free seat selection
• Delta: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

3 airlines operate flights between Seattle and Philadelphia. The airlines offering direct flights on this route include:

• American Airlines
• Alaska Airlines
• Delta

Flights from Seattle to Philadelphia usually depart from Seattle/Tacoma Intl (SEA) and arrive at Philadelphia (PHL).

Here are some options for this route, based on selected ticket types and cabin classes:

• American Airlines: a carry-on bag and a checked bag in Economy Class
• Alaska Airlines: a carry-on bag and a checked bag in Economy Class
• Delta: a carry-on bag and a checked bag in First Class

Bag allowance can vary by ticket type, cabin class, route, and airline, so travellers should check the fare details before booking.

Two cabin classes are available on flights from Seattle to Philadelphia:

• Economy Class
• First Class

On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 425 round-trip via Las Vegas Harry Reid Intl (LAS), compared to C$ 601 for direct.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 49–C$ 139 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

The Airbus A321-100/200 family is used most often on this route, operated mainly by American Airlines and JetBlue. Other aircraft seen on the route include Airbus A321neo variants.

One-stop flights from Seattle to Philadelphia most commonly connect through:

• Chicago O'Hare Intl (ORD) – 34% of one-stop connections
• Denver Intl (DEN) – 27% of one-stop connections
• Minneapolis St Paul (MSP) – 16% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) – 8% of one-stop connections

Chicago O'Hare Intl (ORD) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 17% on the Seattle to Philadelphia route. Thursday is the cheapest departure day at C$ 575 round-trip on average, while Sunday is the most expensive at C$ 690, a difference of C$ 115. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on Seattle to Philadelphia flights, with 40% leaving in that window. Night departures account for 40%, Afternoon flights for 20%, and Evening flights for 0%.

Some of the most popular sights in Philadelphia are Philadelphia Stadium, Philadelphia Convention Center, and Mutter Museum. These are among the most viewed places in Philadelphia on KAYAK.

These are the earliest and latest flight times available from Seattle to Philadelphia:

• Earliest: departs at 8:20 am and lands at 1:34 pm
• Latest: departs at 11:31 pm and lands at 4:45 am.

The flight takes about 5h 14m.

Last-minute fares on this route – booked within 2 weeks of departure – run 48% above the route average of C$ 599. Book 9 weeks before departure for the lowest fares.

A direct flight from Seattle to Philadelphia takes 5h 14m, covering 6,139 km.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 496 to C$ 2,225. That means the highest observed fare was about 4x higher than the lowest one.

One-way fares from Seattle to Philadelphia are currently lower than usual. Average one-way flight prices are about C$ 264, which is 28% below the typical average for this route.

Flying via Chicago Midway (MDW) gives the shortest average 1-stop total travel time at 7h 34m, compared with 7h 47m via Detroit Metropolitan Wayne County (DTW) and 7h 54m via Salt Lake City (SLC).

Philadelphia is 3 hours ahead of Seattle (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

Philadelphia Airport (PHL) hosts 5 major car rental companies, with daily rates starting from around C$ 39 for economy cars. Top options include:
• Payless
• Dollar
• Hertz
• Thrifty
• Budget

Round-trip flights from Seattle to Philadelphia range from C$ 470 to C$ 758, with an average of C$ 599 over the past 12 months. Anything below C$ 470 counts as a good deal.

Two airlines offer in-flight Wi-Fi on Seattle to Philadelphia flights:

• • American Airlines
• • Alaska Airlines