What is the cheapest airline that flies from Illinois to Oslo?

TAP AIR PORTUGAL, KLM, and Lufthansa are the most popular carriers operating from Illinois to Oslo

How long does it take to fly to Oslo?

Flight times vary depending on what airport in Illinois you fly out of and what airport in Oslo you fly into. For example, flying from Chicago to Oslo Gardermoen Airport takes 11h 37m on average. On the other hand, flying from Peoria to Oslo Gardermoen Airport takes 21h 16m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

What airlines fly to Oslo?

Icelandair, Scandinavian Airlines and United Airlines are the top three most popular airlines that fly to Oslo from Illinois according to our data. Icelandair is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Oslo. Keep in mind that there are 10 different airlines that fly to Oslo on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Illinois to Oslo?

Prices for flights from Illinois to Oslo refresh daily.

How many operators does momondo search for flights from Illinois to Oslo?

As of December 2025, there are 11 operators available to choose from for flights from Illinois to Oslo.

How old do you have to be to fly from Illinois to Oslo?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Oslo.

What documentation or ID do you need to fly to Oslo?

The travel and health documents required for your trip to Oslo can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Oslo. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$254 Cheap Flights from Illinois to Oslo in 2025/26

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Find the cheapest flights from Illinois to Oslo

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:30 pm - 11:35 am

ORD

OSL

10h 05m1 stop

9:30 pm - 5:20 pm

OSL

ORD

26h 50m1 stop

$361Icelandair

lun., ene. 12 - dom., ene. 25

6:30 pm - 8:35 pm

ORD

OSL

19h 05m1 stop

1:10 pm - 5:20 pm

OSL

ORD

11h 10m1 stop

$384Icelandair

sáb., ene. 24 - mié., ene. 28

7:10 pm - 4:40 pm

ORD

OSL

14h 30m1 stop

9:00 am - 4:45 pm

OSL

ORD

14h 45m1 stop

$425Scandinavian Airlines

dom., ene. 25 - mié., ene. 28

2:19 pm - 11:30 pm

STL

OSL

26h 11m2 stops

8:30 pm - 6:17 pm

OSL

STL

28h 47m2 stops

$500British Airways

lun., abr. 20 - lun., abr. 27

2:19 pm - 6:40 pm

STL

OSL

21h 21m2 stops

5:05 pm - 7:30 pm

OSL

STL

33h 25m1 stop

$508British Airways

lun., abr. 20 - lun., abr. 27

5:59 pm - 4:40 pm

MDW

OSL

15h 41m2 stops

6:30 am - 4:25 pm

OSL

MDW

16h 55m2 stops

$523Delta

mié., abr. 22 - mar., abr. 28

1:26 pm - 2:45 pm

MDW

OSL

18h 19m2 stops

6:30 am - 5:29 pm

OSL

MDW

17h 59m2 stops

$524Delta

lun., ene. 19 - lun., ene. 26

8:30 am - 11:00 am

STL

OSL

19h 30m2 stops

6:15 am - 5:25 pm

OSL

STL

18h 10m2 stops

$525United Airlines

sáb., ene. 31 - sáb., feb. 7

1:24 pm - 5:40 pm

PIA

OSL

21h 16m2 stops

6:15 am - 2:23 pm

OSL

PIA

39h 08m2 stops

$525United Airlines

vie., ene. 23 - mar., ene. 27

7:15 pm - 2:30 pm

ORD

TRF

12h 15m1 stop

6:00 am - 4:10 pm

TRF

ORD

17h 10m1 stop

$612Scandinavian Airlines

mié., abr. 1 - vie., abr. 10

Icelandair flights from Illinois to Oslo

Our best Icelandair deals on Illinois to Oslo flight tickets

Icelandair

Jan 12

ORD6:30 pmChicago O'Hare Intl

10h 05m

1 stop

OSL11:35 amOslo Gardermoen

Jan 25

OSL9:30 pmOslo Gardermoen

26h 50m

1 stop

ORD5:20 pmChicago O'Hare Intl

$361

Find similar

Icelandair

Jan 24

ORD6:30 pmChicago O'Hare Intl

19h 05m

1 stop

OSL8:35 pmOslo Gardermoen

Jan 28

OSL1:10 pmOslo Gardermoen

11h 10m

1 stop

ORD5:20 pmChicago O'Hare Intl

$384

Find similar

Icelandair

Jan 17

ORD6:30 pmChicago O'Hare Intl

19h 05m

1 stop

OSL8:35 pmOslo Gardermoen

Mar 7

OSL1:10 pmOslo Gardermoen

11h 10m

1 stop

ORD5:20 pmChicago O'Hare Intl

$390

Find similar

Scandinavian Airlines flights from Illinois to Oslo

Our best Scandinavian Airlines deals on Illinois to Oslo flight tickets

Scandinavian Airlines

Jan 25

ORD7:10 pmChicago O'Hare Intl

14h 30m

1 stop

OSL4:40 pmOslo Gardermoen

Jan 28

OSL9:00 amOslo Gardermoen

14h 45m

1 stop

ORD4:45 pmChicago O'Hare Intl

$425

Find similar

Scandinavian Airlines

Jan 14

ORD7:20 pmChicago O'Hare Intl

10h 50m

1 stop

OSL1:10 pmOslo Gardermoen

Jan 21

OSL9:00 amOslo Gardermoen

14h 45m

1 stop

ORD4:45 pmChicago O'Hare Intl

$433

Find similar

Scandinavian Airlines

Jan 17

ORD7:20 pmChicago O'Hare Intl

15h 55m

1 stop

OSL6:15 pmOslo Gardermoen

Jan 23

OSL8:00 amOslo Gardermoen

15h 45m

1 stop

ORD4:45 pmChicago O'Hare Intl

$434

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

lun. 1/12

6:30 pm-11:35 am

1 stop10h 05m

Oslo Gardermoen

dom. 1/25

9:30 pm-5:20 pm

1 stop26h 50m

$361

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

sáb. 1/24

6:30 pm-8:35 pm

1 stop19h 05m

Oslo Gardermoen

mié. 1/28

1:10 pm-5:20 pm

1 stop11h 10m

$384

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

dom. 1/25

7:10 pm-4:40 pm

1 stop14h 30m

Oslo Gardermoen

mié. 1/28

9:00 am-4:45 pm

1 stop14h 45m

$425

St. LouisOslo

STL - OSL

STLOSL

Lambert-St Louis

lun. 4/20

2:19 pm-11:30 pm

2 stops26h 11m

Oslo Gardermoen

lun. 4/27

8:30 pm-6:17 pm

2 stops28h 47m

$500

St. LouisOslo

STL - OSL

STLOSL

Lambert-St Louis

lun. 4/20

2:19 pm-6:40 pm

2 stops21h 21m

Oslo Gardermoen

lun. 4/27

5:05 pm-7:30 pm

1 stop33h 25m

$508

ChicagoOslo

MDW - OSL

MDWOSL

Chicago Midway

mié. 4/22

5:59 pm-4:40 pm

2 stops15h 41m

Oslo Gardermoen

mar. 4/28

6:30 am-4:25 pm

2 stops16h 55m

$523

ChicagoOslo

MDW - OSL

MDWOSL

Chicago Midway

lun. 1/19

1:26 pm-2:45 pm

2 stops18h 19m

Oslo Gardermoen

lun. 1/26

6:30 am-5:29 pm

2 stops17h 59m

$524

St. LouisOslo

STL - OSL

STLOSL

Lambert-St Louis

sáb. 1/31

8:30 am-11:00 am

2 stops19h 30m

Oslo Gardermoen

sáb. 2/7

6:15 am-5:25 pm

2 stops18h 10m

$525

PeoriaOslo

PIA - OSL

PIAOSL

Greater Peoria

vie. 1/23

1:24 pm-5:40 pm

2 stops21h 16m

Oslo Gardermoen

mar. 1/27

6:15 am-2:23 pm

2 stops39h 08m

$525

ChicagoOslo

ORD - TRF

ORDTRF

Chicago O'Hare Intl

mié. 4/1

7:15 pm-2:30 pm

1 stop12h 15m

Oslo Sandefjord

vie. 4/10

6:00 am-4:10 pm

1 stop17h 10m

$612

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Illinois to Oslo

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Oslo?

The month of November is, on average, the cheapest month to fly to Oslo from Illinois, with most prices found around $450. If you’re not able to fly to Oslo in November, then October is your next best option. Flight prices from Illinois to Oslo during October average around $522.

What is the cheapest day to depart on your flight to Oslo?

The cheapest day to depart on your flight to Oslo is on a Sunday when prices can be found for as low as $668. This is often the case because there is less demand to fly during this day of the week. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Oslo for around $755.

What is the cheapest time of day to depart on your flight to Oslo?

Flying to Oslo from Illinois at noon is the least expensive time of day to depart. momondo users have found prices as low as $587 when looking at flights departing at noon. Try not to purchase tickets in the morning because they tend to be around $730. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Oslo?

You are more likely to see cheaper flights to Oslo from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Oslo for around $637 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Oslo from Illinois for as low as $532 on momondo.

Cheap Illinois to Oslo flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Oslo

Fastest flight time	9h 45m
Direct flights	None

The fastest flight from Illinois to Oslo takes 9h 45m

There are no direct flights from Illinois to Oslo. There are no popular flight routes from Illinois to Oslo.

Search flight deals

When did momondo last update prices for flights from Illinois to Oslo?
Prices for flights from Illinois to Oslo refresh daily.
How many operators does momondo search for flights from Illinois to Oslo?
As of December 2025, there are 11 operators available to choose from for flights from Illinois to Oslo.
How old do you have to be to fly from Illinois to Oslo?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Oslo.
What documentation or ID do you need to fly to Oslo?
The travel and health documents required for your trip to Oslo can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Oslo. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Illinois to Oslo

Compare and see reviews for airlines that fly from Illinois to Oslo with momondo

Airline	Rating	Free Cancellation	Price
Scandinavian Airlines	PriceFrom $388	Free Cancellation	Rating 7.4 1,612 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $417	Free Cancellation	Rating 7.0 592 reviews	Search Icelandair flights
Lufthansa	PriceFrom $494	Free Cancellation	Rating 6.8 7,637 reviews	Search Lufthansa flights
American Airlines	PriceFrom $505	Free Cancellation	Rating 7.2 11,041 reviews	Search American Airlines flights
SWISS	PriceFrom $513	Free Cancellation	Rating 7.5 1,817 reviews	Search SWISS flights
British Airways	PriceFrom $530	Free Cancellation	Rating 6.7 7,594 reviews	Search British Airways flights
United Airlines	PriceFrom $532	Free Cancellation	Rating 7.4 9,093 reviews	Search United Airlines flights
Delta	PriceFrom $544	Free Cancellation	Rating 7.9 8,011 reviews	Search Delta flights
KLM	PriceFrom $544	Free Cancellation	Rating 7.7 1,428 reviews	Search KLM flights
Finnair	PriceFrom $555	Free Cancellation	Rating 7.6 1,339 reviews	Search Finnair flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Oslo?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Oslo from Illinois.

Can I find flights from Illinois to Oslo with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Oslo flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Oslo?

Once all potential Illinois to Oslo flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Illinois to Oslo right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Illinois to Oslo flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.