Direct flights from Philadelphia

Enter your travel dates to find the best prices.

Cheapest flights from Philadelphia
Explore the most affordable flight options available from Philadelphia. Find the lowest fares based on data from user searches, with prices last updated on 15 January 2026.

Tue 17/318:22

PHL

SEA

Nonstop6h 13m

อลาสกาแอร์ไลน์

Sat 21/321:55

SEA

PHL

Nonstop5h 10m

อลาสกาแอร์ไลน์

Deal found 14/1฿7,453

Tue 17/318:22

PHL

SEA

Nonstop6h 13m

อลาสกาแอร์ไลน์

Mon 23/321:55

SEA

PHL

Nonstop5h 10m

อลาสกาแอร์ไลน์

Deal found 14/1฿7,767

Tue 12/518:58

PHL

SEA

Nonstop6h 04m

อลาสกาแอร์ไลน์

Fri 29/509:59

SEA

PHL

Nonstop5h 17m

อลาสกาแอร์ไลน์

Deal found 12/1฿8,082

Thu 14/519:17

PHL

SEA

Nonstop6h 12m

อลาสกาแอร์ไลน์

Tue 26/521:27

SEA

PHL

Nonstop5h 13m

อลาสกาแอร์ไลน์

Deal found 14/1฿8,396

Fri 22/519:17

PHL

SEA

Nonstop6h 12m

อลาสกาแอร์ไลน์

Sun 31/509:59

SEA

PHL

Nonstop5h 17m

อลาสกาแอร์ไลน์

Deal found 13/1฿8,711

Sun 22/307:25

PHL

SEA

Nonstop6h 05m

อลาสกาแอร์ไลน์

Wed 25/321:55

SEA

PHL

Nonstop5h 10m

อลาสกาแอร์ไลน์

Deal found 14/1฿9,025

Sun 22/307:25

PHL

SEA

Nonstop6h 05m

อลาสกาแอร์ไลน์

Thu 26/321:55

SEA

PHL

Nonstop5h 10m

อลาสกาแอร์ไลน์

Deal found 14/1฿9,340

Mon 16/318:22

PHL

SEA

Nonstop6h 13m

อลาสกาแอร์ไลน์

Sat 28/321:55

SEA

PHL

Nonstop5h 10m

อลาสกาแอร์ไลน์

Deal found 14/1฿9,654

Mon 16/318:22

PHL

SEA

Nonstop6h 13m

อลาสกาแอร์ไลน์

Fri 27/321:55

SEA

PHL

Nonstop5h 10m

อลาสกาแอร์ไลน์

Deal found 14/1฿9,969

Fri 22/507:05

PHL

SEA

Nonstop5h 59m

เดลต้า

Sun 31/521:50

SEA

PHL

Nonstop5h 15m

เดลต้า

Deal found 14/1฿10,283

Tue 26/519:17

PHL

SEA

Nonstop6h 12m

อลาสกาแอร์ไลน์

Wed 17/621:36

SEA

PHL

Nonstop5h 14m

อลาสกาแอร์ไลน์

Deal found 13/1฿10,598

Tue 24/218:20

PHL

SEA

Nonstop6h 13m

อลาสกาแอร์ไลน์

Mon 2/309:16

SEA

PHL

Nonstop5h 04m

อลาสกาแอร์ไลน์

Deal found 14/1฿10,912

Last-minute flights from Philadelphia
Discover last-minute flight deals departing from Philadelphia. Data was last updated 15 January 2026 and is based on user searches.

Mon 19/118:50

PHL

SEA

Nonstop6h 17m

American Airlines

Fri 30/106:12

SEA

PHL

Nonstop5h 05m

American Airlines

Deal found 14/1฿23,365

Wed 21/119:06

PHL

SEA

Nonstop6h 23m

อลาสกาแอร์ไลน์

Fri 23/109:54

SEA

PHL

Nonstop5h 09m

อลาสกาแอร์ไลน์

Deal found 14/1฿26,007

Fri 23/119:06

PHL

SEA

Nonstop6h 23m

อลาสกาแอร์ไลน์

Mon 26/109:54

SEA

PHL

Nonstop5h 09m

อลาสกาแอร์ไลน์

Deal found 13/1฿24,749

One-way flights from Philadelphia
Search for one-way flight options from Philadelphia. Find affordable one-way fares based on user searches. Data last updated 15 January 2026.

Sat 30/507:05

PHL

SEA

Nonstop5h 59m

เดลต้า

Deal found 13/1฿4,686

Fri 13/318:22

PHL

SEA

Nonstop6h 13m

อลาสกาแอร์ไลน์

Deal found 13/1฿5,000

Mon 9/318:22

PHL

SEA

Nonstop6h 13m

อลาสกาแอร์ไลน์

Deal found 13/1฿5,629

Sun 17/507:05

PHL

SEA

Nonstop5h 59m

เดลต้า

Deal found 14/1฿5,943

Fri 5/607:05

PHL

SEA

Nonstop5h 59m

เดลต้า

Deal found 13/1฿6,258

Mon 13/407:25

PHL

SEA

Nonstop6h 05m

อลาสกาแอร์ไลน์

Deal found 12/1฿6,572

Sat 13/619:04

PHL

SEA

Nonstop6h 15m

อลาสกาแอร์ไลน์

Deal found 14/1฿6,887

Mon 6/719:04

PHL

SEA

Nonstop6h 15m

อลาสกาแอร์ไลน์

Deal found 13/1฿7,830

Sun 5/719:04

PHL

SEA

Nonstop6h 15m

อลาสกาแอร์ไลน์

Deal found 12/1฿9,717

Wed 17/607:05

PHL

SEA

Nonstop5h 59m

เดลต้า

Deal found 14/1฿10,346

Thu 22/118:50

PHL

SEA

Nonstop6h 17m

American Airlines

Deal found 13/1฿11,541

Fri 23/119:06

PHL

SEA

Nonstop6h 23m

อลาสกาแอร์ไลน์

Deal found 13/1฿13,019

Fly to

Route

Depart

Return

Price

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 16/4

07:25-10:30

Nonstop6h 05m

Seattle/Tacoma Intl

Fri 24/4

21:44-06:02

Nonstop5h 18m

฿7,453

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 21/3

07:25-10:30

Nonstop6h 05m

Seattle/Tacoma Intl

Wed 25/3

21:55-06:05

Nonstop5h 10m

฿7,453

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 14/3

18:22-21:35

Nonstop6h 13m

Seattle/Tacoma Intl

Sat 21/3

21:55-06:05

Nonstop5h 10m

฿7,453

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 6/2

19:06-22:29

Nonstop6h 23m

Seattle/Tacoma Intl

Tue 10/2

09:54-18:03

Nonstop5h 09m

฿7,453

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 13/3

18:22-21:35

Nonstop6h 13m

Seattle/Tacoma Intl

Sat 21/3

21:55-06:05

Nonstop5h 10m

฿7,767

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 18/3

18:47-21:52

Nonstop6h 05m

Seattle/Tacoma Intl

Sun 22/3

21:55-06:05

Nonstop5h 10m

฿7,767

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 24/4

18:58-22:02

Nonstop6h 04m

Seattle/Tacoma Intl

Fri 1/5

21:44-06:02

Nonstop5h 18m

฿8,082

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 13/5

19:17-22:29

Nonstop6h 12m

Seattle/Tacoma Intl

Thu 28/5

21:27-05:40

Nonstop5h 13m

฿8,082

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 14/5

19:17-22:29

Nonstop6h 12m

Seattle/Tacoma Intl

Fri 29/5

21:27-05:40

Nonstop5h 13m

฿8,082

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 13/5

19:17-22:29

Nonstop6h 12m

Seattle/Tacoma Intl

Mon 1/6

09:59-18:16

Nonstop5h 17m

฿8,082

Flights are sorted by cheapest return flights first.

Deals found on 13/1

Showing 1-10 of 23 results

Best time to book a flight from Philadelphia

Have a flexible travel schedule? Discover the best time to fly from Philadelphia with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

Direct flights from Philadelphia

Cheapest flights from Philadelphia
Explore the most affordable flight options available from Philadelphia. Find the lowest fares based on data from user searches, with prices last updated on 15 January 2026.

Explore the most affordable flight options available from Philadelphia. Find the lowest fares based on data from user searches, with prices last updated on 15 January 2026.

Last-minute flights from Philadelphia
Discover last-minute flight deals departing from Philadelphia. Data was last updated 15 January 2026 and is based on user searches.

Discover last-minute flight deals departing from Philadelphia. Data was last updated 15 January 2026 and is based on user searches.

One-way flights from Philadelphia
Search for one-way flight options from Philadelphia. Find affordable one-way fares based on user searches. Data last updated 15 January 2026.

Search for one-way flight options from Philadelphia. Find affordable one-way fares based on user searches. Data last updated 15 January 2026.

Find direct flights from Philadelphia within your budget

Best time to book a flight from Philadelphia

Have a flexible travel schedule? Discover the best time to fly from Philadelphia with our price prediction graph.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Direct flights from Pennsylvania cities

Book a direc flight from one of these other cities located in Pennsylvania.

Direct flights from North America cities

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Direct flights from United States

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฿4,686+ Direct flights from Philadelphia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

Direct flights from Philadelphia

Cheapest flights from PhiladelphiaExplore the most affordable flight options available from Philadelphia. Find the lowest fares based on data from user searches, with prices last updated on 15 January 2026.

Explore the most affordable flight options available from Philadelphia. Find the lowest fares based on data from user searches, with prices last updated on 15 January 2026.

Find direct flights from Philadelphia within your budget

Best time to book a flight from Philadelphia

Have a flexible travel schedule? Discover the best time to fly from Philadelphia with our price prediction graph.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Direct flights from Pennsylvania cities

Book a direc flight from one of these other cities located in Pennsylvania.

100% Free

Book With Flexibility

Travel Smart

Cheapest flights from Philadelphia
Explore the most affordable flight options available from Philadelphia. Find the lowest fares based on data from user searches, with prices last updated on 15 January 2026.