HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seoul

$466+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEL
Jul 22 — Jul 291
Wed 7/22
Wed 7/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to Seoul with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 June 22, 2026.

This United Airlines deal was found by Cheapflights users on 6/18. 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.
Thu 8/136:36 pm
PHL
-
ICN
1 stop20h 44m
United Airlines
Thu 8/274:50 pm
ICN
-
PHL
1 stop27h 59m
United Airlines
Deal found 6/18$1,031
This Booking.com deal was found by Cheapflights users on 6/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:02 am
PHL
-
ICN
1 stop21h 28m
Alaska Airlines
Sat 9/57:35 pm
ICN
-
PHL
1 stop23h 05m
Alaska Airlines
Deal found 6/18$1,032
This United Airlines deal was found by Cheapflights users on 6/18. 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.
Sun 11/19:30 am
PHL
-
ICN
1 stop30h 10m
United Airlines
Sat 11/1412:45 pm
ICN
-
PHL
1 stop22h 35m
United Airlines
Deal found 6/18$1,041
This United Airlines deal was found by Cheapflights users on 6/18. 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.
Sun 11/18:26 pm
PHL
-
ICN
2 stops29h 49m
United Airlines
Mon 11/912:45 pm
ICN
-
PHL
2 stops20h 33m
United Airlines
Deal found 6/18$1,046
This Alaska Airlines deal was found by Cheapflights users on 6/18. 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.
Tue 9/16:59 pm
PHL
-
ICN
1 stop33h 31m
Alaska Airlines
Sat 10/318:00 pm
ICN
-
PHL
1 stop34h 49m
Alaska Airlines
Deal found 6/18$1,057
This United Airlines deal was found by Cheapflights users on 6/18. 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.
Sun 7/267:45 pm
PHL
-
ICN
2 stops30h 15m
United Airlines
Sat 8/2211:30 am
ICN
-
PHL
2 stops35h 07m
United Airlines
Deal found 6/18$1,059
This Delta deal was found by Cheapflights users on 6/19. 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.
Tue 9/16:15 am
PHL
-
ICN
1 stop18h 55m
Delta
Sat 10/316:00 pm
ICN
-
PHL
1 stop19h 51m
Delta
Deal found 6/19$1,066
This Delta deal was found by Cheapflights users on 6/19. 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.
Tue 9/15:20 pm
PHL
-
ICN
2 stops21h 40m
Delta
Thu 10/17:40 pm
ICN
-
PHL
2 stops26h 02m
Delta
Deal found 6/19$1,071
This Booking.com deal was found by Cheapflights users on 6/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:59 pm
PHL
-
ICN
1 stop33h 31m
Alaska Airlines
Mon 9/147:35 pm
ICN
-
PHL
1 stop23h 05m
Alaska Airlines
Deal found 6/20$1,082
This Alaska Airlines deal was found by Cheapflights users on 6/22. 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.
Sun 11/17:00 am
PHL
-
ICN
1 stop20h 35m
Alaska Airlines
Sat 11/148:00 pm
ICN
-
PHL
1 stop23h 33m
Alaska Airlines
Deal found 6/22$1,091
This United Airlines deal was found by Cheapflights users on 6/18. 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.
Mon 8/319:27 am
PHL
-
ICN
1 stop29h 53m
United Airlines
Mon 9/2111:30 am
ICN
-
PHL
1 stop19h 00m
United Airlines
Deal found 6/18$1,094
This United Airlines deal was found by Cheapflights users on 6/20. 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 9/11:06 pm
PHL
-
ICN
2 stops26h 14m
United Airlines
Thu 10/111:30 am
ICN
-
PHL
1 stop22h 45m
United Airlines
Deal found 6/20$1,095

Find 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 June 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,031
(United Airlines)

One-way from

$466
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,719
Provider with most accurate pricing for Philadelphia-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Seoul (SEL) flights.
Search Deals
From Philadelphia to Seoul (SEL)
Search Deals
One-way flight from Philadelphia to Seoul (SEL)
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($165 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 June 22, 2026.
Use the filters below to find and compare flights from Philadelphia to Seoul that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Wed 9/2

6:00 am-3:00 pm

1 stop20h 00m

Incheon Intl

Mon 11/2

6:00 pm-7:45 am

1 stop27h 45m

$1,041

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Sun 11/1

6:10 am-4:15 pm

1 stop20h 05m

Incheon Intl

Mon 11/9

6:00 pm-7:45 am

1 stop27h 45m

$1,041

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Fri 8/28

6:00 am-3:00 pm

1 stop20h 00m

Incheon Intl

Fri 9/4

11:30 am-12:59 am

2 stops26h 29m

$1,046

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Sun 11/1

6:10 am-4:15 pm

1 stop20h 05m

Incheon Intl

Sat 11/14

12:45 pm-11:07 pm

2 stops24h 22m

$1,046

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Wed 8/5

5:16 pm-4:00 am

1 stop21h 44m

Incheon Intl

Tue 8/25

6:50 pm-9:38 am

1 stop27h 48m

$1,066

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Fri 8/28

5:20 pm-4:00 am

2 stops21h 40m

Incheon Intl

Fri 9/4

7:00 pm-5:50 am

1 stop23h 50m

$1,071
Quickest round-trip

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Wed 9/2

5:45 am-4:50 pm

2 stops22h 05m

Incheon Intl

Mon 11/2

6:45 pm-11:40 pm

2 stops18h 55m

$1,071

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Sun 9/6

10:34 am-4:20 am

2 stops28h 46m

Incheon Intl

Mon 9/14

4:50 pm-7:49 am

1 stop27h 59m

$1,095

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Sun 9/6

8:00 am-4:20 am

2 stops31h 20m

Incheon Intl

Wed 9/23

11:30 am-6:54 pm

2 stops20h 24m

$1,096

PhiladelphiaIncheon

PHL - ICN

PHLICN

Philadelphia

Sat 8/8

6:05 am-4:25 pm

1 stop21h 20m

Incheon Intl

Sat 8/29

6:50 pm-9:38 am

1 stop27h 48m

$1,116

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

Showing 1-10 of 36 resultsSorted by cheapest first
1
2
3
4

Compare providers for flights from Philadelphia to Seoul

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Seoul in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
OvagoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Seoul flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Seoul flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Seoul flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Seoul flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Seoul flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

Currently, August is the cheapest month in which you can book a flight from Philadelphia to Seoul (average of $493). Flying from Philadelphia to Seoul in July is currently the most expensive (average of $880). 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.

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

What’s the top layover airport for flights from Philadelphia to Seoul?

Share of 1-stop round-trip flights from Philadelphia to Seoul chosen by Cheapflights users in the past 12 months, using the same layover each way.

Dallas (DFW) – chosen by Cheapflights users on 33% of 1-stop itineraries from Philadelphia to Seoul on Cheapflights.

What’s the cheapest layover airport for flights from Philadelphia to Seoul?

Average round-trip fare for 1-stop flights from Philadelphia to Seoul, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Dallas (DFW) is the most affordable 1-stop option, with an average round-trip price of $865.

What’s the fastest layover option from Philadelphia to Seoul?

Shortest average travel time for 1-stop one-way flights from Philadelphia to Seoul, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 19h 05m.

Which airport typically offers the quickest layover for flights from Philadelphia to Seoul?

Average layover duration for 1-stop one-way flights from Philadelphia to Seoul, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via San Francisco (SFO) offer the fastest connection on this route, with an average layover time of 1h 30m.

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

To ensure you get the cheapest price possible for a flight from Philadelphia to Seoul, you should look to book at least 55 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.

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 June 22, 2026.
See what other customers who have flown with Korean Air,Delta, andUnited 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
1,218 reviews

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

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
1,218 reviews
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

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
7.8
Good
8,424 reviews
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

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
9,875 reviews
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

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
7.1
Good
11,745 reviews
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

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
11,244 reviews
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

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 6 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 20h. United Airlines provides one of the quickest options available for as low as $1,041. 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 $780, Air Canada will fly you from Philadelphia to Seoul and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and United Airlines - these airlines can fly you to your destination from $845 and $850, respectively. Users have found that Air Canada is 34% 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 $339 on Delta. Other airlines that offer cheap prices include American Airlines from $394 and United Airlines from $418 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, August is the cheapest month in which you can book a flight from Philadelphia to Seoul (average of $493). Flying from Philadelphia to Seoul in July is currently the most expensive (average of $880). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Philadelphia to Seoul

Discover the top 6 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 June 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$780Average$1,102FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$845Average$966FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$850Average$1,216FlexibilityNo cancel feeOn-time69%
DeltaCheapest$865Average$963FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$915Average$1,118FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$1,129Average$1,204FlexibilityNo cancel feeOn-time81%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights