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฿5,544+ Cheap 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 17/9. 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 Aug — 25 Aug1
1 adult
1 adult, Economy, 0 bags

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 19 July 2026. In the last 7 days, Cheapflights users made a total of 17,341 searches

Fly to

Route

Depart

Return

Price

Cheapest return flight

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 2/9

07:55-15:30

2 stops10h 35m

Seattle/Tacoma Intl

Sat 5/9

05:00-20:45

2 stops12h 45m

฿11,222
Fastest return journey

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 18/8

07:05-10:01

Nonstop5h 56m

Seattle/Tacoma Intl

Sun 23/8

23:10-08:48

1 stop6h 38m

฿11,390

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 31/8

14:05-20:45

2 stops9h 40m

Seattle/Tacoma Intl

Sun 6/9

05:10-00:05

2 stops15h 55m

฿11,625

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 8/10

18:49-23:59

1 stop8h 10m

Seattle/Tacoma Intl

Mon 12/10

19:59-06:05

1 stop7h 06m

฿11,726

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 8/9

05:45-12:58

1 stop10h 13m

Seattle/Tacoma Intl

Sun 13/9

23:59-11:01

1 stop8h 02m

฿12,868

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 12/9

10:30-19:14

2 stops11h 44m

Seattle/Tacoma Intl

Wed 16/9

23:00-12:23

1 stop10h 23m

฿13,372

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 11/8

06:00-14:24

1 stop11h 24m

Seattle/Tacoma Intl

Wed 26/8

18:15-09:43

2 stops12h 28m

฿13,372

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 30/9

06:10-19:03

2 stops15h 53m

Seattle/Tacoma Intl

Sat 10/10

19:25-10:11

2 stops11h 46m

฿13,540

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 19/8

06:00-14:24

1 stop11h 24m

Seattle/Tacoma Intl

Mon 24/8

18:30-12:23

2 stops14h 53m

฿14,279

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 22/8

06:30-14:25

2 stops10h 55m

Seattle/Tacoma Intl

Sun 30/8

23:05-13:15

2 stops11h 10m

฿14,346

Flights are sorted by cheapest return flights first.

Deals found on 18/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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.

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

Currently, February is the cheapest month in which you can book a flight from Philadelphia (average of ฿29,533). Flying from Philadelphia in June will prove the most costly (average of ฿49,255). 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 (631 flights per day), Detroit (356 flights per day) and Atlanta (343 flights per day).

Dublin
Dublin
From ฿24,184
Denver Intl
Denver Intl
From ฿12,438

What is the cheapest place to fly to from Philadelphia?

The cheapest city to fly to from Philadelphia is Denver Intl, with prices starting at ฿12,438. Explore other affordable destinations below.

Denver Intl
Denver Intl
From ฿12,438
Dublin
Dublin
From ฿24,184

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

Booking 58 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.

Browse thousands of different options on Cheapflights for your next trip

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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 19 July 2026.

  • 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, Cancún. While Atlanta, Cancún, Boston 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 ฿12,438 to Denver (prices may vary depending on the airline and departure time). On average, users have booked flights for ฿20,212 to fly from Philadelphia.

  • What is the cheapest first class flight from Philadelphia?

    If you’re looking to fly first-class from Philadelphia to anywhere, put Atlanta on your list as prices start at ฿17,095 for this destination.

  • What is the cheapest month to fly from Philadelphia?

    At the present moment the cheapest month to fly from Philadelphia is currently February; 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 ฿30,205

  • 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.

See more FAQs

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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