C$ 316 Find Cheap Flights from Philadelphia to Seattle – Compare and Save

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

• Earliest: departs at 7:00 am and lands at 1:22 pm
• Latest: departs at 7:35 pm and lands at 1:57 am.

The flight takes about 6h 22m.

A direct flight from Philadelphia to Seattle takes 6h 22m, covering 6,139 km.

No, a passport is not required for this domestic route, but you will need another form of identification, such as a driver's licence.

Round-trip flights from Philadelphia to Seattle range from C$ 494 to C$ 737, with an average of C$ 608 over the past 12 months. Anything below C$ 494 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 25% above the C$ 608 route average. Book 9 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 414 round-trip via Denver Intl (DEN), compared to C$ 609 for direct.

American Airlines is slightly above the route average for timely arrivals, while Alaska Airlines has a lower on-time arrival rate. On-time arrival rates on Philadelphia to Seattle flights are:

• American Airlines: 84% on time
• Alaska Airlines: 81% on time
• Delta: 79% on time

On average, flights on this route are punctual 82% of the time.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 49–C$ 140 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

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

Morning is the busiest departure period on Philadelphia to Seattle flights, with 50% leaving in that window. Evening departures account for 50%, Afternoon flights for 0%, and Night flights for 0%.

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

• American Airlines
• Alaska Airlines
• Delta

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

One-way fares from Philadelphia to Seattle are currently lower than usual. Average one-way flight prices are about C$ 342, which is 10% below the typical average for this route.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging C$ 86 for economy cars. Top options include:

• Fox
• Europcar
• Thrifty
• Budget
• Hertz

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

Morning flights have the fewest delays on this route, while afternoon departures tend to have the most.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Philadelphia to Seattle route, 18% of flights were delayed in the past three months, with delays averaging 2h 33m.

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

• Denver Intl (DEN) – 35% of one-stop connections
• Chicago O'Hare Intl (ORD) – 33% of one-stop connections
• Chicago Midway (MDW) – 11% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) – 6% of one-stop connections

Yes. Flexible dates can save you up to 17% on flights from Philadelphia to Seattle. Wednesday is the cheapest departure day at C$ 568 round-trip on average, while Sunday is the most expensive at C$ 683, a difference of C$ 115.

KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

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

• Alaska Airlines
• American Airlines
• Delta

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 7h 07m, compared with 7h 49m via Minneapolis St Paul (MSP) and 7h 57m via Salt Lake City (SLC).

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

Some of the most popular sights in Seattle are Lumen Field, T-Mobile Park, and Seattle Waterfront. These are among the most viewed places in Seattle on KAYAK.

Among airlines operating Philadelphia to Seattle flights:

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

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 Economy Class

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