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฿5,088+ 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 1/2. 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
4 Jan — 11 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 5 December 2025.

Fri 6/219:06PHL - SEA
Nonstop6h 23mอลาสกาแอร์ไลน์
Tue 10/209:54SEA - PHL
Nonstop5h 09mอลาสกาแอร์ไลน์
Deal found 5/12฿8,224
Tue 17/218:20PHL - SEA
Nonstop6h 13mอลาสกาแอร์ไลน์
Fri 20/209:16SEA - PHL
Nonstop5h 04mอลาสกาแอร์ไลน์
Deal found 5/12฿8,864
Mon 16/218:20PHL - SEA
Nonstop6h 13mอลาสกาแอร์ไลน์
Sat 28/209:16SEA - PHL
Nonstop5h 04mอลาสกาแอร์ไลน์
Deal found 3/12฿9,824
Thu 28/507:05PHL - SEA
Nonstop5h 59mเดลต้า
Mon 1/621:50SEA - PHL
Nonstop5h 15mเดลต้า
Deal found 4/12฿11,425
Wed 3/618:59PHL - SEA
Nonstop5h 59mอลาสกาแอร์ไลน์
Mon 8/621:25SEA - PHL
Nonstop5h 15mอลาสกาแอร์ไลน์
Deal found 4/12฿12,065
Sun 31/507:05PHL - SEA
Nonstop5h 59mเดลต้า
Wed 10/621:50SEA - PHL
Nonstop5h 15mเดลต้า
Deal found 4/12฿12,705
Wed 24/1207:00PHL - SEA
Nonstop6h 04mอลาสกาแอร์ไลน์
Wed 31/1221:29SEA - PHL
Nonstop5h 08mอลาสกาแอร์ไลน์
Deal found 2/12฿13,025
Mon 1/618:59PHL - SEA
Nonstop5h 59mอลาสกาแอร์ไลน์
Thu 11/621:15SEA - PHL
Nonstop5h 12mอลาสกาแอร์ไลน์
Deal found 4/12฿13,185
Sun 19/407:00PHL - SEA
Nonstop5h 57mอลาสกาแอร์ไลน์
Fri 24/421:15SEA - PHL
Nonstop5h 08mอลาสกาแอร์ไลน์
Deal found 3/12฿13,345
Wed 24/1207:00PHL - SEA
Nonstop6h 04mอลาสกาแอร์ไลน์
Thu 1/121:29SEA - PHL
Nonstop5h 08mอลาสกาแอร์ไลน์
Deal found 2/12฿13,665
Mon 1/618:59PHL - SEA
Nonstop5h 59mอลาสกาแอร์ไลน์
Sun 7/621:25SEA - PHL
Nonstop5h 15mอลาสกาแอร์ไลน์
Deal found 5/12฿13,825
Mon 25/507:05PHL - SEA
Nonstop5h 59mเดลต้า
Mon 1/621:50SEA - PHL
Nonstop5h 15mเดลต้า
Deal found 4/12฿13,985

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 5 December 2025.

Fly to

Suvarnabhumi

Route

Depart

Return

Price

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 28/2

18:20-21:33

Nonstop6h 13m

Seattle/Tacoma Intl

Sun 8/3

09:18-17:22

Nonstop5h 04m

฿8,224

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 17/2

18:20-21:33

Nonstop6h 13m

Seattle/Tacoma Intl

Fri 20/2

09:16-17:20

Nonstop5h 04m

฿8,864

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 28/5

07:05-10:04

Nonstop5h 59m

Seattle/Tacoma Intl

Mon 1/6

21:50-06:05

Nonstop5h 15m

฿11,425

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

฿11,425

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 7/4

07:00-09:57

Nonstop5h 57m

Seattle/Tacoma Intl

Sat 11/4

09:15-17:28

Nonstop5h 13m

฿11,425

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 20/3

07:00-09:57

Nonstop5h 57m

Seattle/Tacoma Intl

Mon 23/3

21:15-05:23

Nonstop5h 08m

฿11,425

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 2/4

07:00-09:57

Nonstop5h 57m

Seattle/Tacoma Intl

Mon 6/4

21:15-05:23

Nonstop5h 08m

฿11,425

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 10/4

07:00-09:57

Nonstop5h 57m

Seattle/Tacoma Intl

Wed 15/4

21:15-05:23

Nonstop5h 08m

฿11,425

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 15/5

07:05-10:04

Nonstop5h 59m

Seattle/Tacoma Intl

Sat 23/5

21:50-06:05

Nonstop5h 15m

฿12,065

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 22/5

07:05-10:04

Nonstop5h 59m

Seattle/Tacoma Intl

Mon 25/5

21:50-06:05

Nonstop5h 15m

฿12,065

Flights are sorted by cheapest return flights first.

Deals found on 3/12

Showing 1-10 of 21 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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