$735 Find Cheap Flights from Trondheim to Illinois

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Trondheim to Illinois departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Trondheim to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Trondheim to Illinois, as well as popular online travel agencies
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Flight Deals

Book Cheap Trondheim to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Trondheim to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Trondheim to Illinois

Wed, Apr 15 - Sun, Apr 19
Scandinavian Airlines Logo
5:45 pm - 4:10 pm
TRD
-
ORD
53h 25m2 stops
Scandinavian Airlines Logo
7:00 am - 9:40 am
ORD
-
TRD
19h 40m2 stops
$735Scandinavian Airlines
Wed, Apr 15 - Sun, Apr 19
Scandinavian Airlines Logo
6:25 pm - 4:10 pm
TRD
-
ORD
52h 45m2 stops
Scandinavian Airlines Logo
7:00 am - 9:40 am
ORD
-
TRD
19h 40m2 stops
$737Scandinavian Airlines
Wed, Apr 15 - Sun, Apr 19
Finnair Logo
6:05 pm - 5:50 pm
TRD
-
ORD
30h 45m1 stop
Finnair Logo
9:30 pm - 8:20 am
ORD
-
TRD
27h 50m1 stop
$760Finnair
Wed, Apr 15 - Sun, Apr 19
Finnair Logo
6:05 pm - 5:50 pm
TRD
-
ORD
30h 45m1 stop
Finnair Logo
9:30 pm - 8:20 am
ORD
-
TRD
27h 50m1 stop
$761Finnair
Wed, Apr 15 - Sun, Apr 19
Finnair Logo
6:05 pm - 5:50 pm
TRD
-
ORD
30h 45m1 stop
Finnair Logo
9:30 pm - 8:20 am
ORD
-
TRD
27h 50m1 stop
$763Finnair
Wed, Apr 15 - Sun, Apr 19
Scandinavian Airlines Logo
5:40 am - 4:10 pm
TRD
-
ORD
17h 30m1 stop
Scandinavian Airlines Logo
7:00 am - 9:40 am
ORD
-
TRD
19h 40m2 stops
$766Scandinavian Airlines
Wed, Apr 15 - Sun, Apr 19
Scandinavian Airlines Logo
5:40 am - 4:10 pm
TRD
-
ORD
17h 30m1 stop
Scandinavian Airlines Logo
7:00 am - 9:40 am
ORD
-
TRD
19h 40m2 stops
$769Scandinavian Airlines
Booking Insights

KAYAK's insights & trends for Trondheim to Illinois flights

Get data-powered insights and trends into flights from Trondheim to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Trondheim to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Trondheim to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Trondheim to Illinois is March, when tickets cost $411 (return) on average. On the other hand, the most expensive months are August and December, when the average cost of round-trip tickets is $911 and $849 respectively.

Find deals

Good to know

Low seasonMarch
Cheapest flight$735
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Trondheim to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Trondheim to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Trondheim to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Trondheim to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Trondheim to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Trondheim to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Trondheim to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Trondheim to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Trondheim to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Trondheim to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Trondheim to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Trondheim to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
Scandinavian AirlinesOverall score based on 1607 reviews
7.6Boarding
6.7Entertainment
7.3Comfort
8.0Crew
6.7Food
Airline reviews

I was surprised how good an American airline can be - I was really impressed.

10.0 ExcellentAnonymous, Dec 2025
SFO - BOS
Read more Scandinavian Airlines reviews

I was surprised how good an American airline can be - I was really impressed.

Cut out the nickel and dime pricing for "seat selection" and baggage, To do this on an international flight is just mind boggling. Seriously, why treat customers this way??? Nobody wants these hidden extra fees and everybody hates them. Also plane was too warm and no air vent, and water dripped from the ceiling at one point,

It was so hot on the plane. No air jets above the seats

I paid for my seat 💺 assignments for all for legs of my trip, SFO thru Copenhagen to Prague and back the same way. It cost 💲216.00 USD for all four seats. Despite this, on my return 2 flights, my prepaid seats were given away. When I spoke with the information services professional, she said she could not help me, nor provide an alternative seat equivalent or better than what I had. When I spoke with another representative, she was very rude, disrespectful, and did not help.

Scandinavian was perfect. Nice A350 with an on time departure and an an experienced crew. What a difference from TAP.

The staff were great, the food was good. I just hate being crammed in a tuna can for 10 hours cause I can’t afford a better seat.

No vegetarian option was provided for the regular meal or the pre-landing snack.

Really like this airline. Best food for airlines and comfortable seats and attentive staff. Delay was due to air traffic.

Baggage was mis-handled; food and grocery items in the baggage were damaged.

It was a good flight. Everyone was professional and the flight was smooth.

Everything you need to know for your flight from Trondheim to Illinois

Information on your arrival and departure airports

Trondheim (TRD)