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฿5,002+ 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 1/6. 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
8 Feb — 15 Feb1
1 adult
1 adult, Economy, 0 bags

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 9 January 2026.

Sat 25/407:22PHL - SEA
Nonstop5h 58mอลาสกาแอร์ไลน์
Tue 28/421:44SEA - PHL
Nonstop5h 18mอลาสกาแอร์ไลน์
Deal found 7/1฿7,455
Mon 2/318:20PHL - SEA
Nonstop6h 13mอลาสกาแอร์ไลน์
Sat 21/321:55SEA - PHL
Nonstop5h 10mอลาสกาแอร์ไลน์
Deal found 7/1฿8,084
Thu 28/519:17PHL - SEA
Nonstop6h 12mอลาสกาแอร์ไลน์
Sun 31/509:59SEA - PHL
Nonstop5h 17mอลาสกาแอร์ไลน์
Deal found 8/1฿8,714
Mon 23/218:20PHL - SEA
Nonstop6h 13mอลาสกาแอร์ไลน์
Wed 25/209:16SEA - PHL
Nonstop5h 04mอลาสกาแอร์ไลน์
Deal found 8/1฿9,343
Fri 27/307:25PHL - SEA
Nonstop6h 05mอลาสกาแอร์ไลน์
Sun 5/421:55SEA - PHL
Nonstop5h 10mอลาสกาแอร์ไลน์
Deal found 6/1฿9,626
Fri 27/307:25PHL - SEA
Nonstop6h 05mอลาสกาแอร์ไลน์
Wed 1/421:55SEA - PHL
Nonstop5h 10mอลาสกาแอร์ไลน์
Deal found 8/1฿9,657
Mon 1/607:05PHL - SEA
Nonstop5h 59mเดลต้า
Sun 7/621:50SEA - PHL
Nonstop5h 15mเดลต้า
Deal found 7/1฿9,972
Thu 2/407:25PHL - SEA
Nonstop6h 05mอลาสกาแอร์ไลน์
Sat 11/421:55SEA - PHL
Nonstop5h 10mอลาสกาแอร์ไลน์
Deal found 7/1฿10,255
Fri 22/519:17PHL - SEA
Nonstop6h 12mอลาสกาแอร์ไลน์
Mon 25/509:59SEA - PHL
Nonstop5h 17mอลาสกาแอร์ไลน์
Deal found 8/1฿10,286
Wed 27/519:17PHL - SEA
Nonstop6h 12mอลาสกาแอร์ไลน์
Wed 17/621:36SEA - PHL
Nonstop5h 14mอลาสกาแอร์ไลน์
Deal found 7/1฿10,601
Sun 1/318:20PHL - SEA
Nonstop6h 13mอลาสกาแอร์ไลน์
Sat 21/321:55SEA - PHL
Nonstop5h 10mอลาสกาแอร์ไลน์
Deal found 7/1฿10,884
Sun 29/307:25PHL - SEA
Nonstop6h 05mอลาสกาแอร์ไลน์
Tue 31/321:55SEA - PHL
Nonstop5h 10mอลาสกาแอร์ไลน์
Deal found 8/1฿10,916

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 9 January 2026.

Fly to

Suvarnabhumi

Route

Depart

Return

Price

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 18/4

07:25-10:30

Nonstop6h 05m

Seattle/Tacoma Intl

Wed 22/4

21:44-06:02

Nonstop5h 18m

฿7,455

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 23/4

07:22-10:20

Nonstop5h 58m

Seattle/Tacoma Intl

Tue 28/4

21:44-06:02

Nonstop5h 18m

฿7,455

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 2/5

07:22-10:20

Nonstop5h 58m

Seattle/Tacoma Intl

Wed 13/5

09:59-18:16

Nonstop5h 17m

฿7,455

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 17/2

18:20-21:33

Nonstop6h 13m

Seattle/Tacoma Intl

Sat 21/2

09:16-17:20

Nonstop5h 04m

฿7,455

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 22/4

07:22-10:20

Nonstop5h 58m

Seattle/Tacoma Intl

Sat 25/4

09:32-17:58

Nonstop5h 26m

฿7,455

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 9/5

07:22-10:20

Nonstop5h 58m

Seattle/Tacoma Intl

Mon 18/5

21:27-05:40

Nonstop5h 13m

฿7,455

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 12/3

18:22-21:35

Nonstop6h 13m

Seattle/Tacoma Intl

Wed 18/3

09:37-17:47

Nonstop5h 10m

฿7,455

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 23/4

18:58-22:02

Nonstop6h 04m

Seattle/Tacoma Intl

Sun 26/4

21:44-06:02

Nonstop5h 18m

฿7,455

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 22/4

07:22-10:20

Nonstop5h 58m

Seattle/Tacoma Intl

Sun 26/4

21:44-06:02

Nonstop5h 18m

฿7,455

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 3/2

19:06-22:29

Nonstop6h 23m

Seattle/Tacoma Intl

Tue 10/2

09:54-18:03

Nonstop5h 09m

฿7,455

Flights are sorted by cheapest return flights first.

Deals found on 7/1

Showing 1-10 of 19 results
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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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