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$391+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEL
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to Seoul are usually found in March or January, 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 September 16, 2025.

Round-trip from

$826
(Delta)

One-way from

$391
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,044
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 ($90 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 September 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 September 16, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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.
Sat 9/277:00 amPHL - ICN
1 stop19h 20mDelta
Mon 11/247:30 pmICN - PHL
1 stop18h 20mDelta
Deal found 9/15$826
This Delta deal was found by Cheapflights users on 9/16. 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.
Tue 10/216:00 amPHL - ICN
2 stops21h 30mDelta
Tue 11/46:00 pmICN - PHL
1 stop20h 52mDelta
Deal found 9/16$831
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/185:50 pmPHL - ICN
1 stop32h 55mMultiple Airlines
Mon 10/278:35 pmICN - PHL
2 stops23h 27mMultiple Airlines
Deal found 9/15$832
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/205:50 pmPHL - ICN
1 stop32h 55mMultiple Airlines
Mon 10/278:35 pmICN - PHL
2 stops23h 27mMultiple Airlines
Deal found 9/15$835
This Air Canada deal was found by Cheapflights users on 9/15. 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 9/224:50 pmPHL - ICN
2 stops34h 25mAir Canada
Mon 11/246:55 pmICN - PHL
2 stops33h 52mAir Canada
Deal found 9/15$838
This Air Canada deal was found by Cheapflights users on 9/15. 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.
Sat 9/273:25 pmPHL - ICN
2 stops35h 40mAir Canada
Wed 11/126:55 pmICN - PHL
2 stops57h 52mAir Canada
Deal found 9/15$842
This Air Canada deal was found by Cheapflights users on 9/14. 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.
Tue 9/163:25 pmPHL - ICN
2 stops37h 05mAir Canada
Tue 9/305:45 pmICN - PHL
2 stops35h 04mAir Canada
Deal found 9/14$845
This Air Canada deal was found by Cheapflights users on 9/15. 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.
Sat 9/274:50 pmPHL - ICN
1 stop35h 40mAir Canada
Mon 11/176:55 pmICN - PHL
2 stops33h 52mAir Canada
Deal found 9/15$848
This Air Canada deal was found by Cheapflights users on 9/15. 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.
Sun 9/2110:35 amPHL - ICN
1 stop17h 55mAir Canada
Sun 11/168:10 pmICN - PHL
2 stops32h 37mAir Canada
Deal found 9/15$855
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/87:12 pmPHL - ICN
1 stop33h 23mAlaska Airlines
Sun 11/238:35 pmICN - PHL
1 stop23h 12mAlaska Airlines
Deal found 9/15$885
This Delta deal was found by Cheapflights users on 9/16. 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.
Wed 10/16:00 amPHL - ICN
1 stop21h 25mDelta
Sat 10/186:40 pmICN - PHL
1 stop18h 10mDelta
Deal found 9/16$896
This Delta deal was found by Cheapflights users on 9/16. 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.
Wed 10/16:00 amPHL - ICN
2 stops21h 30mDelta
Thu 10/166:50 pmICN - PHL
1 stop19h 02mDelta
Deal found 9/16$901

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 September 16, 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

Tue 9/30

6:00 am-5:20 pm

1 stop22h 20m

Incheon Intl

Mon 10/20

6:50 pm-12:52 am

1 stop19h 02m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Sat 9/27

7:00 am-3:20 pm

1 stop19h 20m

Incheon Intl

Mon 11/24

7:30 pm-11:50 pm

1 stop18h 20m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Fri 10/24

5:30 am-2:10 pm

1 stop19h 40m

Incheon Intl

Mon 11/3

6:00 pm-12:52 am

1 stop20h 52m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Tue 9/23

6:25 pm-4:00 am

1 stop20h 35m

Incheon Intl

Tue 10/14

4:25 pm-10:13 pm

1 stop18h 48m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Mon 10/20

5:30 am-2:10 pm

1 stop19h 40m

Incheon Intl

Mon 11/3

7:25 pm-12:52 am

1 stop19h 27m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Sat 9/27

5:15 pm-4:00 am

1 stop21h 45m

Incheon Intl

Mon 11/17

6:00 pm-10:50 pm

1 stop18h 50m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Mon 9/29

6:00 am-5:20 pm

1 stop22h 20m

Incheon Intl

Sat 10/25

6:50 pm-12:52 am

1 stop19h 02m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Fri 10/31

6:00 am-3:50 pm

1 stop20h 50m

Incheon Intl

Fri 11/7

7:30 pm-11:50 pm

1 stop18h 20m

$826

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Thu 10/30

7:05 am-4:20 pm

1 stop20h 15m

Incheon Intl

Thu 11/6

8:05 pm-5:50 am

2 stops23h 45m

$831

PhiladelphiaSeoul

PHL - GMP

PHLGMP

Philadelphia

Fri 12/5

6:31 am-10:05 pm

2 stops25h 34m

Seoul Gimpo Intl

Mon 12/15

12:05 pm-1:15 pm

2 stops39h 10m

$987

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 38 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 September 12, 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 $989). Flying from Philadelphia to Seoul in December is currently the most expensive (average of $1,621). 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 September 16, 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.

How much does it cost to fly round-trip from Philadelphia to Seoul?

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 September 16, 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
1,140 reviews

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

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
1,140 reviews
Korean Air
8.4
Very good
1,140 reviews

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

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
7,957 reviews
Korean Air
8.4
Very good
1,140 reviews

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

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
8,924 reviews
Korean Air
8.4
Very good
1,140 reviews

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

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
1,140 reviews

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

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
1,140 reviews

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

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 22h 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 $601, 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 Delta - these airlines can fly you to your destination from $795 and $866, respectively. Users have found that United Airlines is 45% cheaper than the other options available to this destination.

  • 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 $989). Flying from Philadelphia to Seoul in December is currently the most expensive (average of $1,621). 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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Alternative routes for Philadelphia to Seoul

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$601Average$1,087FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$795Average$1,092FlexibilityNo cancel feeOn-time67%
DeltaCheapest$866Average$1,189FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$871Average$1,315FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,060Average$1,306FlexibilityNo cancel feeOn-time81%

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