Cheap flights from Philadelphia to Seattle

Philadelphia
PHL
Seattle-Tacoma
SEA

Flight deals from Philadelphia to Seattle

Below you can see the best deals on flights Philadelphia — Seattle for upcoming dates. Direct and connecting flights from various airlines — compare prices and choose the right ticket.

The lowest price for the next 2 months is on 26 August, from $155.

Top 10 cheap flights from Philadelphia to Seattle

F9
F9
$ 154

Philadelphia — Seattle

20:37—09:19
26 Aug 2026
15 h 42 m
1 stop
F9
F9
F9
$ 172

Philadelphia — Seattle

12:40—09:42
9 Sep 2026
24 h 2 m
2 stops
F9
F9
$ 177

Philadelphia — Seattle

20:37—15:08
8 Sep 2026
21 h 31 m
1 stop
F9
F9
$ 177

Philadelphia — Seattle

14:00—15:08
8 Sep 2026
28 h 8 m
1 stop
F9
F9
F9
$ 179

Philadelphia — Seattle

17:32—18:36
11 Sep 2026
28 h 4 m
2 stops
F9
F9
$ 180

Philadelphia — Seattle

22:15—09:42
8 Sep 2026
14 h 27 m
1 stop
F9
F9
F9
$ 185

Philadelphia — Seattle

12:40—09:42
10 Sep 2026
24 h 2 m
2 stops
F9
DL
DL
$ 186

Philadelphia — Seattle

08:45—23:55
11 Sep 2026
18 h 10 m
2 stops
F9
F9
F9
$ 187

Philadelphia — Seattle

17:32—09:42
15 Sep 2026
19 h 10 m
2 stops
F9
F9
F9
$ 189

Philadelphia — Seattle

17:32—15:08
14 Sep 2026
24 h 36 m
2 stops

Prices were found in the last 72 hours and may change — check the exact price when you continue.

About the Philadelphia — Seattle flight

Looking for cheap flights from Philadelphia to Seattle? Compare fares from different airlines, check the flight schedule and travel time — and book your Philadelphia — Seattle ticket online at the best price.

The route has direct flights — around 97 flights per week, flights are operated by American Airlines, Alaska Airlines, Hawaiian Airlines, Delta and 1 more airline, a nonstop flight takes about 5 h 56 min, the distance between the cities is around 3,829 km.

Planning your trip? You may find our Seattle travel guide, how to get from the airport into town and Seattle weather forecast useful. To catch a low fare, use the low-price calendar and the monthly price chart on this page.

Facts about this route

from $155Min. price
AugustCheapest
SeptemberPeak season
YesDirect flights
3,829 kmDistance
5 h 56 minTravel time
5Airlines
97 / wkFlights

Flight schedule from Philadelphia to Seattle

The table shows direct flights from Philadelphia to Seattle on the selected date. The flight takes approximately 5 h 56 min. Regular flights are operated by American Airlines, Alaska Airlines, Hawaiian Airlines and Delta. Departures from Philadelphia International Airport and Trenton-Mercer Airport airports, arrivals at Seattle-Tacoma International Airport and Paine Field.

For each flight, the following details are shown: departure time (local), arrival city and airport, flight number and airline, terminal or gate, and status. Click on a flight to open its details and go to ticket search. To view flights on a different day, change the date above the table.

Today
Any time
Last update: 15 Aug 2026

Flight ticket prices by day: Philadelphia — Seattle

Below is a calendar of the lowest flight ticket prices for Philadelphia — Seattle by day. Pick a convenient date and instantly see the fare. The cheapest flights on this route start from $155 in August, and the most expensive are around $174 in September. If your travel dates are flexible, the calendar will help you find the best price for your preferred period. To view round-trip fares, switch to the "Round trip" tab above the calendar, select your departure date — and the right-hand calendar will highlight the lowest prices for return flights on each day.

 
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Prices by month

Average one-way fares from Philadelphia to Seattle by month. Tickets are usually cheapest in March (around $174) and priciest in July (about $263) — use the table and chart below to pick the best time to fly.

MonthAverage priceLevelMonthAverage priceLevelMonthAverage priceLevel
Jan$188mediumMay$217mediumSep$207medium
Feb$179lowJun$254highOct$179low
Mar$174lowJul$263highNov$188medium
Apr$198mediumAug$244highDec$254high

Some values are estimated based on seasonality.

When to fly

Weather in Seattle: it is warmest in August (up to 25 °C on average) and coolest in December (around 8 °C). The driest month is July.

Tickets are usually cheapest in August and most expensive in September. Compare prices and weather by month in the charts below to pick the best time to fly.

Temperature · Seattle

Dry and wet days · Seattle

Wind speed and direction · Seattle

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How to get the best deal on a Philadelphia — Seattle ticket

  • Book ahead: fares for Philadelphia — Seattle are usually lower 3–8 weeks before departure than at the last minute.
  • Play with your dates — Tuesday, Wednesday and Saturday departures are often cheaper than Friday and Sunday.
  • Philadelphia is served by more than one airport — compare fares and travel time to each before you book.
  • The cheapest month to fly to Seattle is usually August — plan your trip around it if your dates are flexible.
  • Compare direct and connecting flights: nonstop is faster, while a connection is sometimes noticeably cheaper.
  • Watch the low-price calendar and the monthly price trend on this page — they make it easier to catch a good date.
  • Travelling light? Pick a cabin-baggage-only fare — tickets without checked luggage are noticeably cheaper.
  • Get to the airport in good time — about 2–3 hours before an international departure and roughly an hour before a domestic one.

Airlines

Flights on the Philadelphia — Seattle route are operated by 5 airlines; American Airlines runs the most flights (around 30% of all flights). Compare carriers, flight shares and schedules below.

  • American AirlinesAA
    10x/week
    WebsiteFleet: 965211M pax/year
    • Direct flight PHL → SEA10x/week
      Duration
      6h 13m
      Days
      MTWTFSS
    29.9%Open →
  • Alaska AirlinesAS
    9x/week
    WebsiteFleet: 31545M pax/year
    • Direct flight PHL → SEA9x/week
      Duration
      5h 55m
      Days
      MTWTFSS
    28.9%Open →
  • Hawaiian AirlinesHA
    8x/week
    WebsiteFleet: 7511M pax/year
    • Direct flight PHL → SEA8x/week
    24.7%
  • DeltaDL
    5x/week
    WebsiteFleet: 986190M pax/year
    • Direct flight PHL → SEA5x/week
      Duration
      5h 58m
      Days
      MTWTFSS
    14.4%Open →
  • FinnairAY
    1x/week
    WebsiteFleet: 7911M pax/year
    • Direct flight PHL → SEA1x/week
    2.1%Open →

Cities and airports on the Philadelphia — Seattle route

Flights Philadelphia — Seattle depart from Philadelphia International Airport and Trenton-Mercer Airport and arrive at Seattle-Tacoma International Airport and Paine Field. Below are pages for the cities, countries, and airports on the route: airlines, schedules, and travel guides.

Departure

Philadelphia

PHL
United States
About the cityHow to get thereWeatherAll about the country United States
Arrival

Seattle

SEA
United States
About the cityHow to get thereWeatherAll about the country United States
Departure airports
Arrival airports

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Frequently asked questions about the Philadelphia — Seattle flight

How long is the flight from Philadelphia to Seattle?

A nonstop Philadelphia — Seattle flight takes about 5 h 56 min — the distance between the cities is around 3,829 km.

How far is it from Philadelphia to Seattle?

The distance from Philadelphia to Seattle is about 3,829 km, which a nonstop flight covers in around 5 h 56 min.

Are there direct flights from Philadelphia to Seattle?

Yes, there are nonstop flights Philadelphia — Seattle — around 97 flights per week.

Which airlines fly from Philadelphia to Seattle?

Airlines operating Philadelphia — Seattle include American Airlines, Alaska Airlines, Hawaiian Airlines, Delta, Finnair. See the full list with schedules in the "Airlines" section on this page.

Which airports do Philadelphia — Seattle flights use?

Flights from Philadelphia depart from Philadelphia International Airport, Trenton-Mercer Airport, and arrive at Seattle-Tacoma International Airport, Paine Field. If a city has more than one airport, check which one your ticket uses before you travel.

How much is a ticket from Philadelphia to Seattle?

The price of a Philadelphia — Seattle ticket depends on your travel date, season and demand: it is usually cheapest to fly in August, and most expensive in September. Tickets typically cost between $155 and $174. Check the current lowest fare and low-price calendar on this page.

When is the best time to book flights Philadelphia — Seattle?

Flights Philadelphia — Seattle are usually cheaper when booked in advance — a few weeks before departure and away from peak dates; the most budget-friendly month to fly is August. Compare prices by month in the price trend chart on this page.

How can I find the cheapest flights from Philadelphia to Seattle?

To catch a low fare Philadelphia — Seattle, book a few weeks in advance, keep your dates flexible, and compare airlines and connecting options. The low-price calendar and monthly price chart on this page show the cheapest days and months at a glance: the most budget-friendly month to fly is usually August.

How early should I arrive at the airport?

For international flights, plan to be at the airport about 2–3 hours before departure, and around an hour before a domestic flight. Allow extra time during busy travel seasons and at large hubs, where check-in and security lines can be longer.

Where else you can fly from Philadelphia

See all
AtlantaChicagoBostonOrlandoFort LauderdaleMiamiTorontoDetroitCharlotteWashington, D.C.RaleighDallasLos AngelesPhoenixDenverMinneapolisSan JuanPittsburghNashvilleMontrealColumbusClevelandTampaSan FranciscoIndianapolisNorfolkCincinnatiHoustonLas VegasHarrisburgJacksonvilleRichmondHartfordSouth PortlandAlbanyRochesterKansas CityCancunPunta CanaNorth Charleston

Where else you can fly from Seattle

See all
Los AngelesAnchorageVancouverSan FranciscoPhoenixSan DiegoSan JoseSpokanePortlandSanta AnaNew York CityBoiseDenverChicagoDallasSalt Lake CitySacramentoLas VegasRedmondBostonAtlantaHonoluluWashington, D.C.MinneapolisPascoBurbankAustinFairbanksEugeneJuneauNashvilleHoustonCalgaryBozemanDetroitPalm SpringsMissoulaMedfordRenoOrlando

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