RareNonstop · 5h
CHI to SJUPuerto Rico
San Juan
$162
usually $340
−52%
Most monthly lows $287–$340. Cheaper than every other month on record (3).
Flights · CHI → KEF
Chicago to Reykjavík
Best fare, round trip
$501
Too little price history on this route to compare — the fare is shown as found.
Found
- Depart
- Thu 31 Dec
- Return
- Sat 23 Jan
- Stay
- 23 nights
- Flight
- Nonstop · 6.5h
- Airline
Icelandair
Cached fare — the booking search re-prices live before you pay.
IcelandReykjavíkWaterfalls, black beaches and the aurora — a stopover economy built on absurdly low fares.Best windowJun–Aug · Feb–Mar (aurora)AirportsKeflavík (KEF)Every route into ReykjavíkFare seasonality
When this route gets cheap.
The cheapest itinerary we are tracking flies Icelandair nonstop and takes about 6.5 hours outbound, on a 23-night trip. At $501 for 4,720 km each way, that works out to about $53 per 1,000 km flown. That is above the $43 per 1,000 km typical of medium-haul fares here. Across the 8 departure cities we track at a similar distance from Reykjavík, this fare ranks 5th — 1.9× the $262 we hold from Athens. We have 1 month of cached prices for this route so far — not enough to call a fare cheap or expensive, so we publish the price without a percentage. Fare history here is still too short to name a cheap season. The best time to be in Reykjavík: Jun–Aug · Feb–Mar (aurora).
The 2 days we hold a cached fare for
Press a date to compare its fares
The median cached fare across this calendar is 57% higher than when tracking began on 8 Aug — $467 then versus $732 now, across 14 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 $341, on 3 Oct.
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.
Cached fares · checked 13 Oct 2026
We are still collecting this route's months — 1 month of cached prices so far, too few to chart.
Route facts
- Airports
- O’Hare (ORD) · Midway (MDW) ↔ Keflavík (KEF)
- Flight time
- ≈6.5 hours outbound
- Distance
- ≈4,720 km each way
- Airlines on the board
- Icelandair
- Itineraries
- Nonstop available
- Best months to visit
- Jun–Aug · Feb–Mar (aurora)
Good to know
CHI → KEF, answered.
How far in advance should I book CHI → Reykjavík?
We do not publish a number for this, because we cannot measure it yet.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. Our guide Why flight prices change covers the levers we can measure.
Are there nonstop flights from Chicago to Reykjavík?
Yes — the current board includes nonstop fares (Icelandair). The outbound leg runs around 6.5 hours.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 17 October). 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 Reykjavík?
Lock the flight first — then compare stays for 31 Dec – 23 Jan '27 · 23 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next CHI → KEF drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
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