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Keflavik Intl

$258+ Cheap flights from Illinois to Keflavik Intl (KEF)

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — KEF
Dec 20 — Dec 271
Sat 12/20
Sat 12/27
1 adult, Economy
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Cheap flight deals from Illinois to Keflavik Intl

Keep the following information in mind while searching for Illinois to Keflavik Intl flight deals. Data was last updated November 20, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$413
(Kiwi.com)

One-way from

$258
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$596

Good round-trip deal

$457 or less

Good one-way deal

$402 or less
Provider with most accurate pricing for Chicago (CHI)-Reykjavik (REK) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Reykjavik (REK) flights.
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From Illinois to Reykjavik Keflavik Intl
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One-way flight from Illinois to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 1% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Illinois to Reykjavik Keflavik Intl.
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Price to beat on a one-way flight from Illinois to Reykjavik Keflavik Intl.
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Find flight deals from Illinois to Keflavik Intl

Cheapest flights from Illinois to Keflavik Intl
Explore the most affordable flight options available from Illinois to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2025.

This CrystalTravel deal was found by Cheapflights users on 11/19. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:30 pmORD - KEF
Nonstop6h 15mIcelandair
Thu 12/184:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 11/19$498
This CrystalTravel deal was found by Cheapflights users on 11/20. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:30 pmORD - KEF
Nonstop6h 15mIcelandair
Fri 1/234:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 11/20$512
This Cheapflightsfares deal was found by Cheapflights users on 11/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:30 pmORD - KEF
Nonstop6h 15mIcelandair
Thu 12/254:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 11/19$539
This Gotogate deal was found by Cheapflights users on 11/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:30 pmORD - KEF
Nonstop6h 15mIcelandair
Mon 12/154:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 11/20$562
This Cheapflightsfares deal was found by Cheapflights users on 11/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:30 pmORD - KEF
Nonstop6h 15mIcelandair
Fri 1/94:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 11/19$565
This Mytrip deal was found by Cheapflights users on 11/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/133:26 pmORD - KEF
2 stops24h 19mMultiple Airlines
Sat 12/209:55 amKEF - ORD
2 stops15h 07mMultiple Airlines
Deal found 11/20$590
This KAYAK deal was found by Cheapflights users on 11/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/97:00 amORD - KEF
2 stops21h 45mScandinavian Airlines
Sun 12/1411:30 amKEF - ORD
1 stop35h 15mScandinavian Airlines
Deal found 11/19$644
This Cheapflightsfares deal was found by Cheapflights users on 11/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:30 pmORD - KEF
Nonstop6h 15mIcelandair
Sun 12/149:55 amKEF - ORD
1 stop15h 48mIcelandair
Deal found 11/19$656
This KAYAK deal was found by Cheapflights users on 11/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:30 pmORD - KEF
Nonstop6h 15mIcelandair
Mon 12/294:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 11/20$663
This Gurufare deal was found by Cheapflights users on 11/19. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/274:20 pmORD - KEF
1 stop16h 00mLufthansa
Sun 11/303:20 pmKEF - ORD
1 stop27h 50mLufthansa
Deal found 11/19$669
This Kiwi.com deal was found by Cheapflights users on 11/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/294:20 pmORD - KEF
1 stop16h 00mLufthansa
Sat 12/63:10 pmKEF - ORD
1 stop33h 15mLufthansa
Deal found 11/18$672
This Expedia deal was found by Cheapflights users on 11/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/21:00 pmMLI - KEF
2 stops43h 15mLufthansa
Tue 12/93:20 pmKEF - MLI
2 stops31h 45mLufthansa
Deal found 11/18$811

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Keflavik Intl 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 November 20, 2025.
Use the filters below to find and compare flights from Illinois to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Illinois

Fly to

Keflavik Intl

Route

Depart

Return

Price

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Sun 1/11

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Mon 1/19

4:30 pm-5:20 pm

Nonstop6h 50m

$508

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Wed 1/14

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Mon 1/19

4:30 pm-5:20 pm

Nonstop6h 50m

$519

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Sun 5/17

9:15 pm-8:30 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Sun 5/31

11:30 am-9:05 pm

1 stop14h 35m

$556

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Sun 5/17

9:15 pm-8:30 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Sun 5/24

11:30 am-11:12 pm

1 stop16h 42m

$556

ChicagoReykjavik

MDW - KEF

MDWKEF

Chicago Midway

Thu 5/7

9:20 am-7:00 am

1 stop16h 40m

Reykjavik Keflavik Intl

Fri 5/22

9:30 am-6:05 pm

1 stop13h 35m

$561

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Wed 5/13

5:20 pm-7:00 am

1 stop8h 40m

Reykjavik Keflavik Intl

Sun 5/24

11:25 am-9:36 pm

1 stop15h 11m

$561

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Fri 5/15

12:15 pm-7:00 am

1 stop13h 45m

Reykjavik Keflavik Intl

Sun 5/24

11:25 am-9:36 pm

1 stop15h 11m

$561

ChicagoReykjavik

MDW - KEF

MDWKEF

Chicago Midway

Mon 5/11

1:05 pm-9:30 am

2 stops15h 25m

Reykjavik Keflavik Intl

Mon 5/25

9:30 am-6:31 pm

2 stops14h 01m

$566

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Tue 5/19

5:10 pm-4:25 pm

2 stops18h 15m

Reykjavik Keflavik Intl

Wed 5/27

8:35 am-5:50 pm

1 stop14h 15m

$567

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Sun 1/11

7:05 am-11:20 pm

2 stops34h 15m

Reykjavik Keflavik Intl

Tue 1/20

11:30 am-4:45 pm

1 stop35h 15m

$574

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 51 results
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Best time to book a flight from Illinois to Keflavik Intl

Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from Illinois 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 Illinois to Reykjavik Keflavik Intl Airport

What is the cheapest month to book a flight from Illinois to Reykjavik Keflavik Intl Airport?

Currently, September is the cheapest month in which you can book a flight from Illinois to Reykjavik Keflavik Intl Airport (average of $313). Flying from Illinois to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of $589). 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 IL to KEF?

Find hourly flight availability from Illinois to Keflavik Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2025.

One of the essential ways to save on airfare from Illinois to Reykjavik Keflavik Intl Airport is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 89% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Keflavik Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Reykjavik Keflavik Intl Airport?

    There are many flights that can get you from Illinois to Reykjavik Keflavik Intl Airport in 6h 15m. Fly via Icelandair, United Airlines, or Delta to get the fastest option. Airlines will cover a distance of 2934 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Illinois to Reykjavik Keflavik Intl Airport?

    When deciding which route to take from Illinois to Reykjavik Keflavik Intl Airport consider Chicago O'Hare Intl - Reykjavik Keflavik Intl, Chicago Midway - Reykjavik Keflavik Intl or Lambert-St Louis - Reykjavik Keflavik Intl as they are the most popular.

  • What are the most reliable airlines from Illinois to Reykjavik Keflavik Intl Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Reykjavik Keflavik Intl Airport on time: Icelandair (77%), Air Canada (75%), Austrian Airlines (75%).

  • What are the cheapest flights from Illinois to Reykjavik Keflavik Intl Airport?

    On average you can expect to pay $1,382 for a flight from Illinois to Reykjavik Keflavik Intl Airport. The cheapest flight overall is $332 while the most popular route, (Chicago O'Hare Intl - Reykjavik Keflavik Intl) is currently priced at $348.

  • Can I find deals for flights from Illinois to Keflavik Intl that include hotel bookings?

    Yes. In addition to deals on Illinois to Keflavik Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Keflavik Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Keflavik Intl.

  • Can I find deals for business class flights from Illinois to Keflavik Intl?

    Yes. Cheapflights offers flight deals from Illinois to Keflavik Intl 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 Illinois to Reykjavik Keflavik Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from Illinois to Reykjavik Keflavik Intl Airport (average of $313). Flying from Illinois to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of $589). 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

Traveling to a place near Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
Keflavik
Hveragerdi

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Alternative routes for Illinois to Keflavik Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Illinois to Keflavik Intl

Discover the top 2 airlines that operate flights from Illinois to Keflavik Intl. 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 November 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$360Average$642FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$612Average$992FlexibilityNo cancel feeOn-time69%

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