$173 Find Cheap Flights from Seattle to Philadelphia - Compare and Save

Minute Suites provides private suites you can rent for an hour or two to work, relax, or take a nap after your flight. Each suite has a bed, blankets, pillows, free Wi-Fi, a phone, desk, and HDTV. The facility is located inside security on the terminal A-B link. If you are staying overnight at the airport, book your stay at the Philadelphia Airport Marriott. You can get to the hotel by taking the Sky Bridge from terminal B or the free shuttle that runs every 20 minutes from each terminal.

PHL is served by the SEPTA trains and the SEPTA Regional Airport Line provides services from PHL to downtown Philadelphia. You can also take these trains to get to Amtrack connections. SEPTA also runs buses from PHL and routes 37, 108, and 115 provide regular service to downtown Philadelphia. You can also take taxis or shared rides from the ground transportation area of each terminal. Taxis operating from PHL are metered but have a minimum $10 charge for all destinations.

SEA has provided private nursing spots for breastfeeding parents dubbed the Mothers Room. These rooms offer comfortable seating, rocking chairs, adjustable lighting, baby changing tables, and more. You’ll find the Mothers Room around the kids’ play area and there is also one in the USO lounge. SEA also provides nursing suites with the same facilities available around the S Gate mezzanine level and gates C10, N2, A9, D10, and D23. SEA has a kids’ play area between the central terminal and A Gates for the older kids.

SEA is ADA-compliant, and passengers with limited mobility have access to wheelchair assistance at the airport. These passengers will also have access to accessible transportation, accessible restrooms, stair-free pathways, reserved parking spots, and fast-track services. Low-vision passengers will have free Aira services at SEA, while hard-of-hearing passengers get visual paging and TTY telephones.

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 nonstop 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 cabin bag and a checked bag in Economy Class
• Alaska Airlines: a cabin bag and a checked bag in Economy Class
• Delta: a cabin bag and a checked bag in First Class

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

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

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $306 round-trip via Las Vegas Harry Reid Intl (LAS), compared to $433 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $35–$100 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 $414 round-trip on average, while Sunday is the most expensive at $497, a difference of $83. 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% of flights 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 Convention Center, Rittenhouse Square and Philadelphia Stadium. 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 $431. Book 9 weeks before departure for the lowest fares.

A nonstop flight from Seattle to Philadelphia takes 5h 14m, covering 2,370 miles.

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 $357 to $1,590. 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 $193, which is 27% 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 $28 for economy cars. Top options include:
• Payless
• Dollar
• Hertz
• Thrifty
• Budget

Round-trip flights from Seattle to Philadelphia range from $338 to $546, with an average of $431 over the past 12 months. Anything below $338 counts as a good deal.

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

• • American Airlines
• • Alaska Airlines