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$434+ Cheap flights from Trondheim (TRD) to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
TRD — ORD
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Trondheim to Illinois

Keep the following information in mind while searching for Trondheim to Illinois flight deals. Data was last updated July 31, 2025.

Round-trip from

$434
(Ticket)

Popular in

August

Cheapest in

November

Average price

$826
From Trondheim Vaernes to Illinois
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($141 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Trondheim to Illinois

Cheapest flights from Trondheim to Illinois
Explore the most affordable flight options available from Trondheim to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Ticket deal was found by Cheapflights users on 7/30. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2212:05 pmTRD - ORD
1 stop33h 05mKLM
Fri 9/264:15 pmORD - TRD
1 stop17h 15mKLM
Deal found 7/30$434
This Scandinavian Airlines deal was found by Cheapflights users on 7/30. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:45 pmTRD - ORD
1 stop28h 00mScandinavian Airlines
Mon 11/177:20 pmORD - TRD
1 stop31h 20mScandinavian Airlines
Deal found 7/30$464
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/226:00 amTRD - ORD
2 stops22h 25mDelta
Fri 9/264:15 pmORD - TRD
1 stop12h 15mDelta
Deal found 7/30$489
This Flysmarter deal was found by Cheapflights users on 7/30. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/229:00 amTRD - ORD
2 stops35h 50mFinnair
Fri 9/265:40 pmORD - TRD
2 stops18h 45mFinnair
Deal found 7/30$509
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/229:00 amTRD - ORD
3 stops29h 25mMultiple Airlines
Fri 9/261:59 pmORD - TRD
2 stops22h 26mMultiple Airlines
Deal found 7/30$763

Cheapflights Fare Finder

 
Customize your flight search to find flights from Trondheim to Illinois 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 July 31, 2025.
Use the filters below to find and compare flights from Trondheim to Illinois that are best for you.

Fly from

Trondheim

Fly to

Illinois

Route

Depart

Return

Price

TrondheimChicago

TRD - ORD

TRDORD

Trondheim Vaernes

Mon 9/22

12:05 pm-2:10 pm

1 stop33h 05m

Chicago O'Hare Intl

Fri 9/26

4:15 pm-4:30 pm

1 stop17h 15m

$434

TrondheimChicago

TRD - ORD

TRDORD

Trondheim Vaernes

Thu 11/13

7:45 pm-4:45 pm

1 stop28h 00m

Chicago O'Hare Intl

Mon 11/17

7:20 pm-9:40 am

1 stop31h 20m

$464

TrondheimChicago

TRD - ORD

TRDORD

Trondheim Vaernes

Mon 9/22

6:00 am-9:25 pm

2 stops22h 25m

Chicago O'Hare Intl

Fri 9/26

4:15 pm-11:30 am

1 stop12h 15m

$489

TrondheimChicago

TRD - ORD

TRDORD

Trondheim Vaernes

Mon 9/22

9:00 am-1:50 pm

2 stops35h 50m

Chicago O'Hare Intl

Fri 9/26

5:40 pm-7:25 pm

2 stops18h 45m

$509

TrondheimChicago

TRD - ORD

TRDORD

Trondheim Vaernes

Mon 9/22

9:00 am-7:25 am

3 stops29h 25m

Chicago O'Hare Intl

Fri 9/26

1:59 pm-7:25 pm

2 stops22h 26m

$763

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Best time to book a flight from Trondheim to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Trondheim 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 Trondheim to Illinois
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated July 31, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and Finnair from Trondheim to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Scandinavian Airlines
7.4
Good
1,457 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Related info for your journey

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

  • What airport do you fly from for flights from Trondheim to Illinois?

    If you book a flight to Illinois from Trondheim, you will be flying from Vaernes, which is the city’s only airport. Trondheim Vaernes (TRD) is located 16.4 mi from the center of Trondheim.

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

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

  • How can I find direct flights from Trondheim to Illinois?

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

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

    Yes. Cheapflights offers flight deals from Trondheim to Illinois 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 Trondheim to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Trondheim to Illinois (average of $245). Flying from Trondheim to Illinois in March is currently the most expensive (average of $321). 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.

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