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฿5,379+ 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.
PHL — BKK
24 Apr — 1 May1
1 adult
1 adult, Economy, 0 bags

Find direct flights from Philadelphia within your budget

 
Use the slider to find direct flights from Philadelphia within your budget. Price data is based on user searches made on Cheapflights. Over the past seven days, Cheapflights users made 17,341 searches. This data was last updated on 25 March 2026.

Fly to

Route

Depart

Return

Price

Cheapest return flight

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 6/5

07:22-10:20

Nonstop5h 58m

Seattle/Tacoma Intl

Wed 13/5

21:22-05:35

Nonstop5h 13m

฿10,726

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 1/6

07:10-10:00

Nonstop5h 50m

Seattle/Tacoma Intl

Mon 3/8

21:30-05:53

Nonstop5h 23m

฿10,726
Fastest return journey

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 1/6

07:10-10:00

Nonstop5h 50m

Seattle/Tacoma Intl

Sun 7/6

21:50-06:05

Nonstop5h 15m

฿10,726

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 27/8

07:05-10:04

Nonstop5h 59m

Seattle/Tacoma Intl

Mon 31/8

21:50-06:05

Nonstop5h 15m

฿10,726

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 7/7

07:08-10:04

Nonstop5h 56m

Seattle/Tacoma Intl

Mon 13/7

21:30-05:53

Nonstop5h 23m

฿10,726

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 28/5

07:10-10:00

Nonstop5h 50m

Seattle/Tacoma Intl

Sun 31/5

21:20-05:37

Nonstop5h 17m

฿11,509

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sun 13/9

07:05-10:04

Nonstop5h 59m

Seattle/Tacoma Intl

Mon 21/9

21:50-06:05

Nonstop5h 15m

฿11,541

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 4/7

07:00-09:59

Nonstop5h 59m

Seattle/Tacoma Intl

Fri 17/7

21:30-05:53

Nonstop5h 23m

฿11,541

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sun 12/7

07:08-10:04

Nonstop5h 56m

Seattle/Tacoma Intl

Mon 20/7

21:30-05:53

Nonstop5h 23m

฿11,541

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 10/6

07:00-09:59

Nonstop5h 59m

Seattle/Tacoma Intl

Mon 22/6

21:31-05:45

Nonstop5h 14m

฿11,541

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 21 resultsSorted by cheapest first
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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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