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฿5,341+ 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 28/5. 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
12 Jun — 19 Jun1
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 13 May 2026.

Fly to

Route

Depart

Return

Price

Cheapest return flight

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 12/6

18:45-21:59

Nonstop6h 14m

Seattle/Tacoma Intl

Wed 17/6

09:25-17:35

Nonstop5h 10m

฿10,650

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 3/9

18:04-20:58

Nonstop5h 54m

Seattle/Tacoma Intl

Tue 8/9

21:24-05:40

Nonstop5h 16m

฿10,650

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sun 4/10

07:05-10:04

Nonstop5h 59m

Seattle/Tacoma Intl

Sat 10/10

21:50-06:03

Nonstop5h 13m

฿10,650

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 2/9

18:04-20:58

Nonstop5h 54m

Seattle/Tacoma Intl

Fri 11/9

21:24-05:40

Nonstop5h 16m

฿10,650

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 31/8

07:05-10:04

Nonstop5h 59m

Seattle/Tacoma Intl

Fri 4/9

21:50-06:05

Nonstop5h 15m

฿10,650
Fastest return journey

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 25/8

07:00-09:53

Nonstop5h 53m

Seattle/Tacoma Intl

Sun 30/8

21:24-05:40

Nonstop5h 16m

฿10,650

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 27/8

07:00-09:56

Nonstop5h 56m

Seattle/Tacoma Intl

Sun 6/9

21:50-06:05

Nonstop5h 15m

฿10,650

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 4/7

18:45-21:59

Nonstop6h 14m

Seattle/Tacoma Intl

Thu 9/7

21:20-05:29

Nonstop5h 09m

฿10,650

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 7/10

07:05-10:24

Nonstop6h 19m

Seattle/Tacoma Intl

Mon 12/10

21:50-06:03

Nonstop5h 13m

฿10,650
Cheapest one-way

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 4/11

07:05-10:24

Nonstop6h 19m

฿5,341

Flights are sorted by cheapest return flights first.

Deals found on 12/5

Showing 1-10 of 19 resultsSorted by cheapest first
1
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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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