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฿4,992+ 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 16/1. 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
20 Jan — 27 Jan1
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 21 December 2025.

Fri 6/318:20PHL - SEA
Nonstop6h 13mอลาสกาแอร์ไลน์
Thu 26/321:15SEA - PHL
Nonstop5h 08mอลาสกาแอร์ไลน์
Deal found 19/12฿8,069
Fri 22/518:59PHL - SEA
Nonstop5h 59mอลาสกาแอร์ไลน์
Sun 31/521:25SEA - PHL
Nonstop5h 15mอลาสกาแอร์ไลน์
Deal found 19/12฿8,696
Sun 10/507:05PHL - SEA
Nonstop5h 59mเดลต้า
Tue 12/521:50SEA - PHL
Nonstop5h 15mเดลต้า
Deal found 19/12฿9,324
Sat 28/218:20PHL - SEA
Nonstop6h 13mอลาสกาแอร์ไลน์
Sun 8/309:18SEA - PHL
Nonstop5h 04mอลาสกาแอร์ไลน์
Deal found 19/12฿9,638
Thu 14/507:00PHL - SEA
Nonstop5h 56mอลาสกาแอร์ไลน์
Thu 14/521:25SEA - PHL
Nonstop5h 15mอลาสกาแอร์ไลน์
Deal found 19/12฿9,952
Fri 27/318:35PHL - SEA
Nonstop6h 09mอลาสกาแอร์ไลน์
Sun 5/421:15SEA - PHL
Nonstop5h 08mอลาสกาแอร์ไลน์
Deal found 19/12฿10,266
Wed 27/519:17PHL - SEA
Nonstop6h 12mอลาสกาแอร์ไลน์
Wed 17/609:50SEA - PHL
Nonstop5h 14mอลาสกาแอร์ไลน์
Deal found 20/12฿10,580
Sun 17/507:05PHL - SEA
Nonstop5h 59mเดลต้า
Wed 7/1021:50SEA - PHL
Nonstop5h 13mเดลต้า
Deal found 20/12฿11,522
Tue 16/607:05PHL - SEA
Nonstop5h 59mเดลต้า
Tue 23/621:50SEA - PHL
Nonstop5h 15mเดลต้า
Deal found 19/12฿11,836
Thu 11/607:05PHL - SEA
Nonstop5h 59mเดลต้า
Sun 14/621:50SEA - PHL
Nonstop5h 15mเดลต้า
Deal found 19/12฿12,464
Mon 1/607:05PHL - SEA
Nonstop5h 59mเดลต้า
Sun 7/621:50SEA - PHL
Nonstop5h 15mเดลต้า
Deal found 19/12฿14,348
Fri 15/507:05PHL - SEA
Nonstop5h 59mเดลต้า
Sun 24/521:50SEA - PHL
Nonstop5h 15mเดลต้า
Deal found 20/12฿15,289

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 21 December 2025.

Fly to

Suvarnabhumi

Route

Depart

Return

Price

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 6/3

18:20-21:33

Nonstop6h 13m

Seattle/Tacoma Intl

Thu 26/3

21:15-05:23

Nonstop5h 08m

฿8,069

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 24/4

07:00-09:57

Nonstop5h 57m

Seattle/Tacoma Intl

Fri 1/5

09:15-17:28

Nonstop5h 13m

฿8,696

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 2/4

07:25-10:30

Nonstop6h 05m

Seattle/Tacoma Intl

Fri 17/4

09:37-17:47

Nonstop5h 10m

฿8,696

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 2/5

18:35-21:44

Nonstop6h 09m

Seattle/Tacoma Intl

Wed 13/5

21:25-05:40

Nonstop5h 15m

฿8,696

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 11/5

07:00-09:57

Nonstop5h 57m

Seattle/Tacoma Intl

Mon 18/5

09:40-17:54

Nonstop5h 14m

฿8,696

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sun 24/5

07:00-09:56

Nonstop5h 56m

Seattle/Tacoma Intl

Mon 1/6

21:25-05:40

Nonstop5h 15m

฿8,696

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 4/4

07:25-10:30

Nonstop6h 05m

Seattle/Tacoma Intl

Fri 17/4

09:37-17:47

Nonstop5h 10m

฿8,696

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 4/4

07:00-09:57

Nonstop5h 57m

Seattle/Tacoma Intl

Sat 11/4

21:15-05:23

Nonstop5h 08m

฿8,696

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sun 5/4

18:47-21:52

Nonstop6h 05m

Seattle/Tacoma Intl

Mon 13/4

21:55-06:05

Nonstop5h 10m

฿8,696

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 17/4

07:00-09:57

Nonstop5h 57m

Seattle/Tacoma Intl

Mon 20/4

21:15-05:23

Nonstop5h 08m

฿8,696

Flights are sorted by cheapest return flights first.

Deals found on 20/12

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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