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Keflavik Intl

$176+ Cheap flights from Chicago (CHI) 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — KEF
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago to Reykjavik Keflavik Intl are usually found in January or April, booked 56 days in advance, depart on a Thursday or Wednesday and return on a Thursday

Cheap flight deals from Chicago to Keflavik Intl

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Keflavik Intl (KEF). 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 September 16, 2025.

Round-trip from

$360
(CrystalTravel)

One-way from

$176
(Trip.com)

Popular in

July

Cheapest in

January

Average price

$617

Good round-trip deal

$486 or less

Good one-way deal

$383 or less
From Chicago (CHI) to Reykjavik Keflavik Intl
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One-way flight from Chicago (CHI) to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 6% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Chicago (CHI) to Reykjavik Keflavik Intl.
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Price to beat on a one-way flight from Chicago (CHI) to Reykjavik Keflavik Intl.
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Find flight deals from Chicago to Keflavik Intl

Cheapest flights from Chicago to Keflavik Intl
Explore the most affordable flight options available from Chicago to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This CrystalTravel deal was found by Cheapflights users on 9/16. 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 11/106:30 pmORD - KEF
Nonstop6h 15mIcelandair
Fri 11/144:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/16$365
This CrystalTravel deal was found by Cheapflights users on 9/14. 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.
Tue 12/26:30 pmORD - KEF
Nonstop6h 15mIcelandair
Wed 12/104:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/14$368
This Flighttix deal was found by Cheapflights users on 9/16. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1210:15 pmORD - KEF
Nonstop6h 05mIcelandair
Tue 10/214:25 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/16$373
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Fri 12/56:30 pmORD - KEF
Nonstop6h 15mIcelandair
Sun 12/74:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/15$382
This CrystalTravel deal was found by Cheapflights users on 9/15. 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
Sun 12/144:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/15$385
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Wed 10/297:30 pmORD - KEF
Nonstop6h 15mIcelandair
Wed 11/54:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/14$386
This FlightHub deal was found by Cheapflights users on 9/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:30 pmORD - KEF
Nonstop6h 15mIcelandair
Mon 12/84:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/13$387
This CrystalTravel deal was found by Cheapflights users on 9/16. 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.
Fri 11/146:30 pmORD - KEF
Nonstop6h 15mIcelandair
Sat 11/224:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/16$390
This deal was found by Cheapflights users on 9/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:30 pmORD - KEF
Nonstop6h 15mIcelandair
Wed 12/104:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/15$394
This Icelandair deal was found by Cheapflights users on 9/13. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/296:30 pmORD - KEF
Nonstop6h 15mIcelandair
Tue 12/94:30 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/13$399
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Sun 10/127:25 pmORD - KEF
Nonstop6h 15mIcelandair
Mon 10/204:25 pmKEF - ORD
Nonstop6h 50mIcelandair
Deal found 9/16$414
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Mon 10/204:12 pmMDW - KEF
1 stop31h 43mMultiple Airlines
Fri 10/243:05 pmKEF - MDW
1 stop31h 08mMultiple Airlines
Deal found 9/15$423

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago 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 September 16, 2025.
Use the filters below to find and compare flights from Chicago to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Chicago

Fly to

Keflavik Intl

Route

Depart

Return

Price

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Sat 11/29

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Sun 12/7

4:30 pm-5:20 pm

Nonstop6h 50m

$399

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Wed 12/3

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Thu 12/11

4:30 pm-5:20 pm

Nonstop6h 50m

$399

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Sun 11/30

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Mon 12/8

4:30 pm-5:20 pm

Nonstop6h 50m

$399

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Sat 11/29

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Wed 12/10

4:30 pm-5:20 pm

Nonstop6h 50m

$399

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Mon 12/15

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Sun 12/21

4:30 pm-5:20 pm

Nonstop6h 50m

$529

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Mon 12/8

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Wed 12/17

4:30 pm-5:20 pm

Nonstop6h 50m

$529

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Tue 12/9

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Wed 12/17

4:30 pm-5:20 pm

Nonstop6h 50m

$529

ChicagoReykjavik

MDW - KEF

MDWKEF

Chicago Midway

Sun 10/12

12:44 pm-4:55 am

1 stop11h 11m

Reykjavik Keflavik Intl

Fri 10/17

3:05 pm-10:21 am

2 stops24h 16m

$542

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Fri 12/5

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Sun 12/7

4:30 pm-5:20 pm

Nonstop6h 50m

$544

ChicagoReykjavik

ORD - KEF

ORDKEF

Chicago O'Hare Intl

Thu 12/11

6:30 pm-6:45 am

Nonstop6h 15m

Reykjavik Keflavik Intl

Tue 12/16

4:30 pm-5:20 pm

Nonstop6h 50m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 38 results
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Best time to book a flight from Chicago to Keflavik Intl

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

How far ahead should I book a flight from Chicago to Reykjavik Keflavik Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Keflavik Intl. Price data was last updated on September 12, 2025.

The best time to book flights from Chicago to Reykjavik Keflavik Intl Airport is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, November is the cheapest month in which you can book a flight from Chicago to Reykjavik Keflavik Intl Airport (average of $328). Flying from Chicago to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $656). 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 CHI to KEF?

Find hourly flight availability from Chicago 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 September 16, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 17% on flights from Chicago to Reykjavik Keflavik Intl Airport by exploring options for tickets at noon.

Weekly flight availability from Chicago to Reykjavik Keflavik Intl Airport

Explore weekly flight availability from Chicago to Keflavik Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 16, 2025.

The most flights from CHI to KEF are scheduled on a Monday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

Reviews of airlines servicing Keflavik Intl

Get insights into the airlines that provide service to Keflavik Intl. 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 Keflavik Intl. Reviews last updated September 16, 2025.
Get a feel of what it's like to fly with United Airlines and Icelandair from Chicago to Reykjavik Keflavik Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Icelandair
7.0
Good
544 reviews
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Chicago 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 Chicago to Reykjavik Keflavik Intl Airport?

    Departing from Chicago to Reykjavik Keflavik Intl Airport will take you 6h 15m. The distance between Chicago and Reykjavik Keflavik Intl Airport is about 2934 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Chicago to Reykjavik Keflavik Intl Airport round-trip?

    Icelandair, at $362, was found to be the cheapest airline from Chicago to Reykjavik Keflavik Intl Airport. An alternate airline flying to your destination would be United Airlines. Users have found that Icelandair is 44% cheaper than the other options available to this destination.

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

    The top 3 most reliable airlines when flying from Chicago to Reykjavik Keflavik Intl Airport are Icelandair (77%), Air Canada (57%) and Austrian Airlines (57%).

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

    Looking at all options, your cheapest flight can be booked for $358. While the most popular route (Chicago O'Hare Intl - Reykjavik Keflavik Intl) can be booked for $360 on average, our data indicates $1,204 when flying from Chicago to Reykjavik Keflavik Intl Airport.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Chicago to Reykjavik Keflavik Intl Airport (average of $328). Flying from Chicago to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $656). 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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Top 2 airlines flying from Chicago to Keflavik Intl

Discover the top 2 airlines that operate flights from Chicago 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$362Average$649FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$612Average$711FlexibilityNo cancel feeOn-time69%

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