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$407+ Cheap flights from Philadelphia (PHL) to Seoul (SEL)

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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEL
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to Seoul are usually found in November or March, booked 39 days in advance, depart on a Friday or Wednesday and return on a Wednesday

Cheap flight deals from Philadelphia to Seoul

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Seoul (SEL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 20, 2025.

Round-trip from

$826
(Delta)

One-way from

$407
(American Airlines)

Popular in

December

Cheapest in

November

Average price

$1,007
From Philadelphia to Seoul (SEL)
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One-way flight from Philadelphia to Seoul (SEL)
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Highest demand for flights based on searches. 7% potential increase in price ($89 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Philadelphia to Seoul

Cheapest flights from Philadelphia to Seoul
Explore the most affordable flight options available from Philadelphia to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This Delta deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/111:35 amPHL - ICN
1 stop27h 25mDelta
Fri 9/124:25 pmICN - PHL
1 stop17h 30mDelta
Deal found 8/19$826
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/266:00 amPHL - ICN
2 stops20h 30mDelta
Sat 11/155:50 pmICN - PHL
1 stop20h 33mDelta
Deal found 8/18$831
This Trip.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:00 amPHL - ICN
1 stop22h 35mMultiple Airlines
Mon 10/276:55 pmICN - PHL
2 stops27h 46mMultiple Airlines
Deal found 8/18$846
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/168:15 amPHL - ICN
2 stops31h 05mUnited Airlines
Tue 9/304:50 pmICN - PHL
1 stop25h 36mUnited Airlines
Deal found 8/19$856
This Fareboom deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:00 amPHL - ICN
1 stop22h 35mHawaiian Airlines
Mon 10/278:35 pmICN - PHL
1 stop22h 07mHawaiian Airlines
Deal found 8/19$862
This Alaska Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:22 amPHL - ICN
1 stop22h 13mAlaska Airlines
Thu 10/168:35 pmICN - PHL
1 stop22h 05mAlaska Airlines
Deal found 8/18$866
This Alaska Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/217:10 amPHL - ICN
1 stop21h 25mAlaska Airlines
Mon 11/248:35 pmICN - PHL
1 stop23h 12mAlaska Airlines
Deal found 8/19$867
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:55 pmPHL - ICN
2 stops32h 20mUnited Airlines
Mon 12/156:00 pmICN - PHL
2 stops32h 07mUnited Airlines
Deal found 8/18$871
This Air Canada deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/204:50 pmPHL - ICN
2 stops34h 25mAir Canada
Mon 11/36:55 pmICN - PHL
2 stops33h 52mAir Canada
Deal found 8/19$872
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:34 amPHL - ICN
1 stop19h 26mUnited Airlines
Sun 10/1211:30 amICN - PHL
1 stop30h 56mUnited Airlines
Deal found 8/19$874
This Ovago deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:20 amPHL - GMP
2 stops37h 35mJapan Airlines
Mon 12/157:50 amGMP - PHL
2 stops25h 30mJapan Airlines
Deal found 8/19$960
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/169:15 pmPHL - GMP
2 stops31h 45mJapan Airlines
Mon 10/277:50 amGMP - PHL
2 stops27h 35mJapan Airlines
Deal found 8/18$966

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Seoul that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from Philadelphia to Seoul that are best for you.

Fly from

Philadelphia

Fly to

Seoul

Route

Depart

Return

Price

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Fri 9/19

7:00 am-3:20 pm

1 stop19h 20m

Incheon Intl

Thu 9/25

7:40 pm-5:45 am

1 stop23h 05m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Tue 9/2

4:59 pm-4:00 am

1 stop22h 01m

Incheon Intl

Sat 9/13

10:15 am-5:50 pm

1 stop20h 35m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Tue 9/2

4:59 pm-4:00 am

1 stop22h 01m

Incheon Intl

Thu 9/18

4:25 pm-12:54 am

1 stop21h 29m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Fri 9/5

6:00 am-4:25 pm

1 stop21h 25m

Incheon Intl

Wed 9/17

4:25 pm-10:12 pm

1 stop18h 47m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Mon 9/8

9:39 am-4:25 pm

1 stop17h 46m

Incheon Intl

Wed 9/24

6:50 pm-9:25 am

1 stop27h 35m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Thu 9/4

6:00 am-4:25 pm

1 stop21h 25m

Incheon Intl

Mon 9/15

4:25 pm-8:55 pm

1 stop17h 30m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Mon 9/1

4:59 pm-4:00 am

1 stop22h 01m

Incheon Intl

Tue 9/16

10:15 am-4:38 pm

1 stop19h 23m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Fri 10/24

6:18 pm-4:00 am

1 stop20h 42m

Incheon Intl

Sat 11/1

6:00 pm-12:52 am

1 stop19h 52m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Mon 9/1

7:00 am-3:20 pm

1 stop19h 20m

Incheon Intl

Mon 9/15

4:25 pm-8:55 pm

1 stop17h 30m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Tue 9/16

6:00 am-4:25 pm

1 stop21h 25m

Incheon Intl

Tue 10/28

9:35 am-4:35 pm

1 stop20h 00m

$826

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 37 results
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Best time to book a flight from Philadelphia to Seoul

Have a flexible travel schedule? Discover the best time to fly to Seoul from Philadelphia with our price prediction graph.
Estimated round-trip 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.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Seoul

How far ahead should I book a flight from Philadelphia to Seoul?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Seoul. Price data was last updated on August 8, 2025.

To ensure you get the cheapest price possible for a flight from Philadelphia to Seoul, you should look to book at least 36 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from Philadelphia to Seoul (average of $992). Flying from Philadelphia to Seoul in December is currently the most expensive (average of $1,635). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to SEL?

Find hourly flight availability from Philadelphia to Seoul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

It’s optimal to fly from Philadelphia to Seoul in the morning. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing Seoul

Get insights into the airlines that provide service to Seoul. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seoul. Reviews last updated August 20, 2025.
See what other customers who have flown with Korean Air, Delta, and United Airlines from Philadelphia to Seoul have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,131 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,131 reviews
Korean Air
8.4
Very good
1,131 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,982 reviews
Korean Air
8.4
Very good
1,131 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
United Airlines
7.4
Good
8,928 reviews
Korean Air
8.4
Very good
1,131 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
American Airlines
7.2
Good
10,000 reviews
Korean Air
8.4
Very good
1,131 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Air Canada
7.1
Good
10,000 reviews
Korean Air
8.4
Very good
1,131 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Seoul. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Philadelphia to Seoul?

    Most people fly from Philadelphia (PHL) if they book a flight from Philadelphia to Seoul. On average, Philadelphia has 0 outbound flights to Seoul per day from 5 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.

  • How long is the flight from Philadelphia to Seoul?

    A quick flight from Philadelphia to Seoul can take about 19h 20m. Delta provides one of the quickest options available for as low as $826. Philadelphia and Seoul are separated by a distance of 6915 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Philadelphia to Seoul round-trip?

    Currently priced at $560, United Airlines will fly you from Philadelphia to Seoul and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and American Airlines - these airlines can fly you to your destination from $795 and $871, respectively. Users have found that United Airlines is 49% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Philadelphia to Seoul one-way?

    One-way options have recently been found by users for as low as $407 on American Airlines. Other airlines that offer cheap prices include United Airlines from $419 and Japan Airlines from $457 one-way.

  • Can I find deals for flights from Philadelphia to Seoul that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Seoul flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Seoul?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Seoul.

  • Can I find deals for business class flights from Philadelphia to Seoul?

    Yes. Cheapflights offers flight deals from Philadelphia to Seoul by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, February is the cheapest month in which you can book a flight from Philadelphia to Seoul (average of $992). Flying from Philadelphia to Seoul in December is currently the most expensive (average of $1,635). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 5 airlines flying from Philadelphia to Seoul

Discover the top 5 airlines that operate flights from Philadelphia to Seoul. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$560Average$1,109FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$795Average$1,086FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$871Average$1,326FlexibilityNo cancel feeOn-time71%
DeltaCheapest$872Average$1,191FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$1,060Average$1,395FlexibilityNo cancel feeOn-time81%

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