ICN - PHL

$418 Find Cheap Flights from Seoul Incheon Airport to Philadelphia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Incheon Intl to Philadelphia departing on 5/21. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Philadelphia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to Philadelphia, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to Philadelphia, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$605
Typical prices: $629-$772
Delta
Fr 9/11Mo 10/5
ICN - PHL • 2 stops
Cheapest one-way
$418
Typical prices: $518-$587
Delta
Do 5/21
ICN - PHL • 1 stop
Top airlines
Cheapest • from $605 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Incheon Intl and Philadelphia. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $811 (round-trip)
Shortest trip • 16h 23m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 26% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Philadelphia!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Incheon Intl to Philadelphia (ICN-PHL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Incheon Intl to Philadelphia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Incheon Intl to Philadelphia

Fr, Sep 11 - Mo, Okt 5
Delta Logo
7:00 pm - 5:43 am
ICN
-
PHL
23h 43m
2 stops
Delta Logo
7:59 pm - 5:20 pm
PHL
-
ICN
32h 21m
2 stops
$605Delta
Mi, Apr 1 - Sa, Apr 25
Delta Logo
7:20 pm - 5:41 am
ICN
-
PHL
23h 21m
1 stop
Delta Logo
6:05 pm - 3:20 pm
PHL
-
ICN
32h 15m
1 stop
$606Delta
Mo, Apr 27 - Mo, Mai 4
Delta Logo
7:20 pm - 5:59 am
ICN
-
PHL
23h 39m
1 stop
Delta Logo
7:15 am - 3:20 pm
PHL
-
ICN
19h 05m
1 stop
$611Delta
Sa, Sep 12 - Mo, Okt 5
Delta Logo
7:40 pm - 11:40 pm
ICN
-
PHL
17h 00m
1 stop
Delta Logo
7:05 am - 4:50 pm
PHL
-
ICN
20h 45m
1 stop
$655Delta
Mi, Apr 1 - Fr, Apr 24
Delta Logo
7:20 pm - 5:41 am
ICN
-
PHL
23h 21m
1 stop
Delta Logo
6:05 am - 5:20 pm
PHL
-
ICN
22h 15m
1 stop
$656Delta
Mi, Apr 1 - Mo, Apr 20
Delta Logo
7:20 pm - 5:41 am
ICN
-
PHL
23h 21m
1 stop
Delta Logo
6:00 am - 4:40 pm
PHL
-
ICN
21h 40m
2 stops
$673Delta
Do, Apr 2 - Mo, Apr 20
Delta Logo
7:20 pm - 5:41 am
ICN
-
PHL
23h 21m
1 stop
Delta Logo
6:00 am - 5:20 pm
PHL
-
ICN
22h 20m
1 stop
$706Delta
Mo, Apr 27 - Mi, Apr 29
Delta Logo
7:20 pm - 5:59 am
ICN
-
PHL
23h 39m
1 stop
Delta Logo
7:15 am - 3:20 pm
PHL
-
ICN
19h 05m
1 stop
$708Delta
Fr, Mai 1 - Mi, Mai 6
Alaska Airlines Logo
7:35 pm - 6:02 am
ICN
-
PHL
23h 27m
1 stop
Alaska Airlines Logo
7:22 am - 5:30 pm
PHL
-
ICN
21h 08m
1 stop
$713Alaska Airlines
Di, Mai 12 - Mi, Jun 24
Korean Air Logo
8:45 am - 8:49 pm
ICN
-
PHL
25h 04m
1 stop
Korean Air Logo
6:20 pm - 4:00 am
PHL
-
ICN
20h 40m
1 stop
$717Korean Air
Booking Insights

KAYAK's insights & trends for Incheon Intl to Philadelphia flights

Get data-powered insights and trends into flights from Incheon Intl to Philadelphia to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Incheon Intl Airport to Philadelphia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Incheon Intl Airport to Philadelphia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Incheon Intl Airport to Philadelphia is November, where tickets cost $626 (return) on average. On the other hand, the most expensive months are August and March, where the average cost of round-trip tickets is $1,112 and $1,081 respectively.

Good to know

Low seasonJanuary
Cheapest flight$418
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Seoul Incheon Airport to Philadelphia

When to book flights from Incheon Intl to Philadelphia

Are your dates flexible? Find out the best times to travel from Incheon Intl to Philadelphia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Seoul Incheon Airport to Philadelphia flights

  • What is the cheapest flight from Incheon Intl Airport to Philadelphia?

    In the last 3 days, the lowest price for a flight from Incheon Intl Airport to Philadelphia was $418 for a one-way ticket and $605 for a round-trip.

  • Do I need a passport to fly between Seoul Incheon Airport and Philadelphia?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Seoul Incheon Airport and on arrival in Philadelphia.

  • Which aircraft models fly most regularly from Seoul Incheon Airport to Philadelphia?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seoul Incheon Airport to Philadelphia?

    SkyTeam is the only airline alliance operating flights between Seoul Incheon Airport and Philadelphia.

  • How does KAYAK find such low prices on flights from Seoul Incheon Airport to Philadelphia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seoul Incheon Airport to Philadelphia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seoul Incheon Airport to Philadelphia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from Seoul Incheon Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seoul Incheon Airport to Philadelphia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Philadelphia with an airline and back to Seoul Incheon Airport with another airline. Booking your flights between Seoul Incheon Airport and PHL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seoul Incheon Airport to Philadelphia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Philadelphia from Seoul Incheon Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Incheon Intl to Philadelphia

 
See real verified KAYAK customer reviews for airlines flying from Incheon to Philadelphia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Incheon Intl to Philadelphia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8288 reviews
7.9Comfort
8.1Boarding
7.8Entertainment
8.5Crew
7.2Food
Airline reviews

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

10.0 ExcellentDebra, Mar 2026
PBI - ATL
Read more Delta reviews

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

No pilots so we were two hours late taking off and then no gate agents when we arrived in Salt Lake.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Everything you need to know for your flight from Incheon Intl to Philadelphia

Information on your arrival and departure airports