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฿4,391+ 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
5 Mar — 12 Mar1
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 3 February 2026.

Tue 3/318:20
PHL
-
SEA
Nonstop6h 13m
อลาสกาแอร์ไลน์
Mon 20/421:55
SEA
-
PHL
Nonstop5h 10m
อลาสกาแอร์ไลน์
Deal found 3/2฿8,750
Sun 10/506:59
PHL
-
SEA
Nonstop5h 51m
เดลต้า
Wed 13/521:27
SEA
-
PHL
Nonstop5h 17m
เดลต้า
Deal found 3/2฿9,382
Sat 7/318:20
PHL
-
SEA
Nonstop6h 13m
อลาสกาแอร์ไลน์
Fri 24/421:44
SEA
-
PHL
Nonstop5h 18m
อลาสกาแอร์ไลน์
Deal found 2/2฿10,013
Fri 22/506:59
PHL
-
SEA
Nonstop5h 51m
เดลต้า
Sat 30/521:27
SEA
-
PHL
Nonstop5h 17m
เดลต้า
Deal found 3/2฿10,329
Fri 29/506:59
PHL
-
SEA
Nonstop5h 51m
เดลต้า
Sun 7/621:50
SEA
-
PHL
Nonstop5h 15m
เดลต้า
Deal found 3/2฿10,487
Mon 25/506:59
PHL
-
SEA
Nonstop5h 51m
เดลต้า
Thu 28/521:27
SEA
-
PHL
Nonstop5h 17m
เดลต้า
Deal found 3/2฿10,961
Sat 7/318:20
PHL
-
SEA
Nonstop6h 13m
อลาสกาแอร์ไลน์
Tue 10/309:18
SEA
-
PHL
Nonstop5h 04m
อลาสกาแอร์ไลน์
Deal found 3/2฿11,277
Mon 2/318:20
PHL
-
SEA
Nonstop6h 13m
อลาสกาแอร์ไลน์
Fri 24/421:44
SEA
-
PHL
Nonstop5h 18m
อลาสกาแอร์ไลน์
Deal found 3/2฿11,435
Wed 10/607:05
PHL
-
SEA
Nonstop5h 59m
เดลต้า
Mon 15/621:50
SEA
-
PHL
Nonstop5h 15m
เดลต้า
Deal found 3/2฿11,593
Sun 17/506:59
PHL
-
SEA
Nonstop5h 51m
เดลต้า
Fri 22/521:27
SEA
-
PHL
Nonstop5h 17m
เดลต้า
Deal found 3/2฿11,909
Fri 5/606:59
PHL
-
SEA
Nonstop5h 49m
เดลต้า
Sun 14/621:50
SEA
-
PHL
Nonstop5h 15m
เดลต้า
Deal found 3/2฿12,067
Thu 16/707:05
PHL
-
SEA
Nonstop5h 59m
เดลต้า
Sun 26/721:50
SEA
-
PHL
Nonstop5h 15m
เดลต้า
Deal found 3/2฿12,225

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 3 February 2026.

Fly to

Suvarnabhumi

Route

Depart

Return

Price

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 28/2

18:20-21:33

Nonstop6h 13m

Seattle/Tacoma Intl

Thu 23/4

21:44-06:02

Nonstop5h 18m

฿8,750

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 8/5

06:59-09:50

Nonstop5h 51m

Seattle/Tacoma Intl

Sun 10/5

21:27-05:44

Nonstop5h 17m

฿8,750

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 28/2

18:20-21:33

Nonstop6h 13m

Seattle/Tacoma Intl

Fri 24/4

21:44-06:02

Nonstop5h 18m

฿8,750

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 15/5

06:59-09:50

Nonstop5h 51m

Seattle/Tacoma Intl

Mon 25/5

21:27-05:44

Nonstop5h 17m

฿8,750

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 4/3

18:20-21:33

Nonstop6h 13m

Seattle/Tacoma Intl

Wed 22/4

21:44-06:02

Nonstop5h 18m

฿8,750

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 15/5

06:59-09:50

Nonstop5h 51m

Seattle/Tacoma Intl

Tue 26/5

21:27-05:44

Nonstop5h 17m

฿8,750

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 4/3

18:20-21:33

Nonstop6h 13m

Seattle/Tacoma Intl

Fri 24/4

21:44-06:02

Nonstop5h 18m

฿8,750

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 28/5

06:59-09:50

Nonstop5h 51m

Seattle/Tacoma Intl

Mon 1/6

21:27-05:42

Nonstop5h 15m

฿8,750

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 9/3

18:22-21:35

Nonstop6h 13m

Seattle/Tacoma Intl

Wed 18/3

21:55-06:05

Nonstop5h 10m

฿8,750

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 21/5

06:59-09:50

Nonstop5h 51m

Seattle/Tacoma Intl

Sun 24/5

21:27-05:44

Nonstop5h 17m

฿8,750

Flights are sorted by cheapest return flights first.

Deals found on 3/2

Showing 1-10 of 18 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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