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฿2,951+ Cheap flights from Philadelphia

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/10. 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
18 Oct — 25 Oct1
1 adult
1 adult, Economy

What to know about flights from Philadelphia

Discover essential information about flights departing from Philadelphia, including flight schedules, destinations, airlines operating at the Philadelphia airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 18 September 2025.

Good round-trip deal

฿15,789 or less
Price to beat on a round-trip flight from Philadelphia.
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Find flights from Philadelphia

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 18 September 2025.

Wed 22/1006:34PHL - SEA
1 stop10h 50mUnited Airlines
Thu 30/1023:59SEA - PHL
1 stop7h 25mUnited Airlines
Deal found 17/9฿8,471
Wed 12/1110:34PHL - SEA
2 stops11h 18mUnited Airlines
Sun 16/1123:59SEA - PHL
1 stop7h 25mUnited Airlines
Deal found 17/9฿8,630
Tue 16/1207:06PHL - SEA
Nonstop6h 14mอลาสกาแอร์ไลน์
Thu 1/121:29SEA - PHL
Nonstop5h 08mอลาสกาแอร์ไลน์
Deal found 16/9฿8,788
Fri 14/1107:10PHL - SEA
1 stop8h 46mเดลต้า
Mon 17/1123:10SEA - PHL
1 stop6h 32mเดลต้า
Deal found 17/9฿8,852
Sun 11/106:30PHL - SEA
1 stop8h 02mUnited Airlines
Sat 17/119:30SEA - PHL
2 stops11h 07mUnited Airlines
Deal found 17/9฿8,947
Tue 28/1006:25PHL - SEA
1 stop10h 13mUnited Airlines
Tue 28/1023:59SEA - PHL
2 stops11h 07mUnited Airlines
Deal found 17/9฿9,137
Thu 18/1218:35PHL - SEA
1 stop9h 00mเซาท์เวสต์แอร์ไลน์
Tue 13/106:05SEA - PHL
2 stops11h 15mเซาท์เวสต์แอร์ไลน์
Deal found 16/9฿9,169
Thu 5/306:00PHL - SEA
1 stop9h 51mUnited Airlines
Sun 8/319:10SEA - PHL
1 stop7h 06mUnited Airlines
Deal found 16/9฿9,201
Tue 28/1005:25PHL - SEA
2 stops10h 10mเซาท์เวสต์แอร์ไลน์
Wed 29/1011:00SEA - PHL
1 stop8h 30mเซาท์เวสต์แอร์ไลน์
Deal found 17/9฿9,264
Wed 15/1010:05PHL - SEA
1 stop8h 40mUnited Airlines
Mon 20/1017:31SEA - PHL
1 stop8h 55mUnited Airlines
Deal found 16/9฿9,296
Fri 14/1115:20PHL - SEA
2 stops11h 45mเซาท์เวสต์แอร์ไลน์
Mon 17/1105:40SEA - PHL
1 stop13h 55mเซาท์เวสต์แอร์ไลน์
Deal found 17/9฿9,360
Fri 14/1115:20PHL - SEA
2 stops11h 45mเซาท์เวสต์แอร์ไลน์
Tue 18/1109:35SEA - PHL
1 stop10h 00mเซาท์เวสต์แอร์ไลน์
Deal found 17/9฿9,391

Find flights from Philadelphia within your budget

 
Find flights departing from Philadelphia that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 18 September 2025. In the last 7 days, Cheapflights users made a total of 17,341 searches

Fly to

Suvarnabhumi

Route

Depart

Return

Price

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 20/11

07:10-12:56

1 stop8h 46m

Seattle/Tacoma Intl

Mon 24/11

06:00-16:39

1 stop7h 39m

฿8,788

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 17/10

18:50-23:59

1 stop8h 09m

Seattle/Tacoma Intl

Tue 21/10

13:40-00:52

1 stop8h 12m

฿8,788

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 12/11

07:10-14:54

1 stop10h 44m

Seattle/Tacoma Intl

Sun 16/11

19:12-05:55

1 stop7h 43m

฿8,788

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 1/11

11:49-16:54

1 stop8h 05m

Seattle/Tacoma Intl

Sat 8/11

06:00-16:35

1 stop7h 35m

฿8,788

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 14/11

07:10-12:56

1 stop8h 46m

Seattle/Tacoma Intl

Mon 17/11

23:10-08:42

1 stop6h 32m

฿8,852

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 3/3

18:35-21:47

Nonstop6h 12m

Seattle/Tacoma Intl

Wed 4/3

09:15-17:31

Nonstop5h 16m

฿9,423

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 3/3

18:35-21:47

Nonstop6h 12m

Seattle/Tacoma Intl

Wed 4/3

09:15-17:31

Nonstop5h 16m

฿9,423

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sun 7/12

18:54-22:12

Nonstop6h 18m

Seattle/Tacoma Intl

Tue 9/12

21:35-05:46

Nonstop5h 11m

฿9,423

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 3/11

19:12-22:30

Nonstop6h 18m

Seattle/Tacoma Intl

Fri 7/11

21:30-05:42

Nonstop5h 12m

฿9,423

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sun 1/2

18:35-21:47

Nonstop6h 12m

Seattle/Tacoma Intl

Mon 9/2

09:15-17:31

Nonstop5h 16m

฿9,740

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 60 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.

Travel insights for flights from Philadelphia

Get recent, data-driven insights about flights from Philadelphia including ideal travel times, pricing trends, and more.

When is the best time to book a flight from Philadelphia?

Use this chart to determine the optimal time to book a return flight from Philadelphia to Suvarnabhumi. Price data was last updated on 12 September 2025.

Booking 63 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Philadelphia?

Currently, August is the cheapest month in which you can book a flight from Philadelphia (average of ฿21,575). Flying from Philadelphia in June will prove the most costly (average of ฿30,966). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

What are popular destinations to fly to from Philadelphia?

If you’re flying from Philadelphia, these routes are more frequently taken by airlines Chicago (647 flights per day), Boston (313 flights per day) and Atlanta (307 flights per day).

Tampa
Tampa
From ฿833
San Francisco
San Francisco
From ฿498

What is the cheapest place to fly to from Philadelphia?

The cheapest city to fly to from Philadelphia is San Francisco, with prices starting at ฿15,789. Explore other affordable destinations below.

San Francisco
San Francisco
From ฿498
Tampa
Tampa
From ฿833

Browse thousands of different options on Cheapflights for your next trip

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Direct flights from Pennsylvania

Book a direct flight from one of these other cities located in Pennsylvania.
Direct flights from Philadelphia
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Direct flights from San Francisco
Direct flights from Boston
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Direct flights from Honolulu
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Direct flights from Austin
Direct flights from Charlotte
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Direct flights from New Orleans
Direct flights from Nashville
Direct flights from Anchorage
Direct flights from Norfolk
Direct flights from St. Louis
Direct flights from Rochester
Direct flights from Fort Lauderdale
Direct flights from Cleveland
Direct flights from Kansas City
Direct flights from San Antonio
Direct flights from Charleston
Direct flights from Bozeman

Related info for your journey

Access useful and relevant information related to your journey from Philadelphia. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 18 September 2025.

  • What are the most popular destinations to fly to from Philadelphia?

    The most selected flight destinations from Philadelphia for the current month are Atlanta, Boston, Chicago. While Atlanta, Boston, Nashville are the top choices made by travellers year-round.

  • What is the cheapest flight from Philadelphia to anywhere?

    Users have flown out of Philadelphia for as low as ฿15,789 to San Francisco (prices may vary depending on the airline and departure time). On average, users have booked flights for ฿21,153 to fly from Philadelphia.

  • What is the cheapest month to fly from Philadelphia?

    At the present moment the cheapest month to fly from Philadelphia is currently August; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from Philadelphia?

    Here are some of the cheapest flight destinations from Philadelphia:
    Fly from Philadelphia to Bangkok from ฿25,287

  • How does Cheapflights help users find flights from Philadelphia?

    Cheapflights makes it easy to find flights from Philadelphia by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

  • Why should you use Cheapflights to find cheap flight tickets from Philadelphia?

    Cheapflights simply makes it quick and affordable to book flights from Philadelphia by bringing together all flight options from hundreds of airlines and agencies online — and we put them in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

  • Can Cheapflights find flights from Philadelphia with no change fees?

    Cheapflights does show flights with no change fees to all users. To see these options for flights from Philadelphia, users can toggle the no change fees filter when performing a flight search.

  • Can Cheapflights notify me if prices for flights from Philadelphia become cheaper?

    Yes, Cheapflights offers price alerts on flights from Philadelphia so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Philadelphia?

Cheapflights makes it easy to find flights from Philadelphia by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Philadelphia?

Cheapflights simply makes it quick and affordable to book flights from Philadelphia by bringing together all flight options from hundreds of airlines and agencies online — and we put them in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Philadelphia with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Philadelphia, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Philadelphia become cheaper?

Yes, Cheapflights offers price alerts on flights from Philadelphia so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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