Route brief · CHI → SEL
Chicago → Seoul
$647
−39% vs typical
seasonal median $1,060 · difference $413
Mar 23 '27 – Apr 28 '27 · 36 nights
EVA Air1 stop
- Usual monthly lows
- $1,014–$1,075
- Board rank
- Stronger than 88%
- Route sample
- 5 observed months
Cached fare — the booking search re-prices live before you pay.
Destination briefSELSeoulPalaces wedged between skyscrapers, barbecue smoke at midnight, cafés that outnumber people.Best windowApr–May · Sep–OctAirportsIncheon (ICN) · Gimpo (GMP)All routes into SeoulWhen this route gets cheap.
Cached-fare history: across 5 months, Mar is the cheapest for CHI → SEL. Best time to be there: Apr–May · Sep–Oct.
Fares bottom out in March around $647 and peak in November near $1,098 — a $451 spread across the 5 months we track. The cheapest itinerary we are tracking makes one stop and takes about 18.5 hours outbound, on a 36-night trip — ticketed under EVA Air, which on a connecting fare need not operate every leg. At $647 for 10,510 km each way, that works out to about $31 per 1,000 km flown. That is below the $44 typical of long-haul fares here. Across the 30 departure cities we track at a similar distance from Seoul, this fare ranks 16th — 34% above the $484 from Istanbul. That puts it in the cheaper half of the 26 routes of similar length we watch out of Chicago, where the middle fare is $793.
The 7 days we hold a cached fare for
Tap a date → live search
The median cached fare across this calendar is 2% lower than when tracking began on Aug 8 — $1,125 then versus $1,098 now, across 6 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $690, on Aug 29.
- Tue, Sep 1$1,310
- Sat, Sep 12$1,014
- Mon, Sep 21$1,098
- Thu, Oct 1$1,104
- Thu, Oct 8$1,075
- Sat, Oct 31$1,096
- Tue, Nov 10$1,098
These are the only days we have a cached price for on this route so far — not the only days it flies. The search above covers any date.
Cheapest in Mar · around $647
39% below the $1,060 typical fare
Cheapest round-trip fare found per month · Chicago → Seoul · cached-price history
Route facts
- Airports
- O’Hare (ORD) · Midway (MDW) ↔ Incheon (ICN) · Gimpo (GMP)
- Flight time
- ~18.5 hours outbound
- Distance
- ~10,510 km each way
- Typical price
- $1,060 round-trip (seasonal median)
- Airlines on the board
- EVA Air
- Itineraries
- Connections on current fares
- Best months to visit
- Apr–May · Sep–Oct
CHI → SEL, answered.
Is $647 a good price for Chicago to Seoul?
Yes — the seasonal median for this route is around $1,060 round-trip. At $647 you're 39% below that, saving about $413, which we rate great for this route.
What is the cheapest month to fly from Chicago to Seoul?
Across 5 months of cached-fare history, Mar comes out cheapest on this route. The best months to actually be in Seoul are Apr–May · Sep–Oct — when those overlap, that's your window.
How far in advance should I book CHI → Seoul?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. What we can measure is which month is cheap: across 5 months of cached fares, Mar comes out lowest on this route. See /guides/what-moves-a-flight-price/ for what does move a fare.
Are there nonstop flights from Chicago to Seoul?
The current cheapest fares involve a connection, ticketed under EVA Air. Nonstop options exist on many dates at higher prices — check the live search for your exact dates.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on September 1). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Seoul?
Lock the flight first — then compare stays for Mar 23 '27 – Apr 28 '27 · 36 nights.
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Missed it?
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