$427 Cheap Flights from Trondheim (TRD) to Chicago (ORD)

View $427 flight on Tue, May 19, 2026Opens in a new window

Popular airlines from Vaernes Airport (TRD) to Chicago O'Hare Intl. Airport (ORD)

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Cheap Flights from Trondheim to Chicago (TRD-ORD)

Prices were available within the past 7 days and start at $427 for one-way flights and $685 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Fri, May 1 - Sun, May 10
TRD
Trondheim
ORD
Chicago
$685 Roundtrip, found 4 days ago
$685
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Fri, May 1 from Trondheim to Chicago, returning Sun, May 10, priced at $685 found 4 days ago
Lufthansa
Fri, May 1 - Sun, May 10
TRD
Trondheim
ORD
Chicago
$721 Roundtrip, found 4 days ago
$721
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Fri, May 1 from Trondheim to Chicago, returning Sun, May 10, priced at $721 found 4 days ago
Lufthansa
Fri, May 1 - Sun, May 10
TRD
Trondheim
ORD
Chicago
$723 Roundtrip, found 4 days ago
$723
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Fri, May 1 from Trondheim to Chicago, returning Sun, May 10, priced at $723 found 4 days ago
Lufthansa
Thu, May 14 - Mon, May 18
TRD
Trondheim
ORD
Chicago
$748 Roundtrip, found 5 hours ago
$748
Roundtrip
found 5 hours ago
Select Lufthansa flight, departing Thu, May 14 from Trondheim to Chicago, returning Mon, May 18, priced at $748 found 5 hours ago
KLM
Fri, May 1 - Sun, May 10
TRD
Trondheim
ORD
Chicago
$752 Roundtrip, found 4 days ago
$752
Roundtrip
found 4 days ago
Select KLM flight, departing Fri, May 1 from Trondheim to Chicago, returning Sun, May 10, priced at $752 found 4 days ago
Lufthansa
Fri, May 1 - Sun, May 10
TRD
Trondheim
ORD
Chicago
$759 Roundtrip, found 4 days ago
$759
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Fri, May 1 from Trondheim to Chicago, returning Sun, May 10, priced at $759 found 4 days ago
Lufthansa
Thu, Apr 2 - Wed, Apr 15
TRD
Trondheim
ORD
Chicago
$763 Roundtrip, found 5 days ago
$763
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Apr 2 from Trondheim to Chicago, returning Wed, Apr 15, priced at $763 found 5 days ago
Finnair
Thu, May 14 - Tue, May 19
TRD
Trondheim
ORD
Chicago
$884 Roundtrip, found 11 hours ago
$884
Roundtrip
found 11 hours ago
Select Finnair flight, departing Thu, May 14 from Trondheim to Chicago, returning Tue, May 19, priced at $884 found 11 hours ago
Scandinavian Airlines
Thu, May 14 - Mon, May 18
TRD
Trondheim
ORD
Chicago
$911 Roundtrip, found 5 hours ago
$911
Roundtrip
found 5 hours ago
Select Scandinavian Airlines flight, departing Thu, May 14 from Trondheim to Chicago, returning Mon, May 18, priced at $911 found 5 hours ago
TAP Portugal
Thu, Apr 2 - Sat, Apr 25
TRD
Trondheim
ORD
Chicago
$1,612 Roundtrip, found 1 day ago
$1,612
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Thu, Apr 2 from Trondheim to Chicago, returning Sat, Apr 25, priced at $1,612 found 1 day ago

Frequently asked questions

How much does a flight from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) cost?
You can find cheap one-way flights from $427 and cheap return flights from $685 Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) with Expedia. Return flights typically cost between $909 and $3842. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
The cheapest month to fly from TRD to ORD is May when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
Enter TRD to ORD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
KLM is one of the cheapest airlines offering connecting flights from Trondheim (TRD) to Chicago, IL (ORD) with a layover in Schiphol (AMS), starting from around $798. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
To find a cheap flight from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
The earliest flight from Vaernes (TRD) to O'Hare International Airport (ORD) typically leaves at 5:30 AM, operated by SAS and Air France. Departing early can help you maximize your time in Chicago. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
The most popular departure times for flights from Vaernes (TRD) to O'Hare Intl. (ORD) are in the evening, from 6pm to 9pm. About 27% of passengers prefer this time window. Many major carriers, including Widerøe, Lufthansa, and United Airlines, offer flights during this window. This timing works well because it allows you to travel after a day of activities.
How long does it take to fly from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
Flying from TRD to ORD with a connection usually takes about 16 hours, traveling roughly 3,926 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
Business class seats are offered on the TRD to ORD route with SAS and KLM.
How do I earn miles on a Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) flight with Expedia?
It's easy to earn miles on a Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Chicago from Vaernes (TRD)?
If you're planning to travel to Chicago from Vaernes (TRD), you can fly into O'Hare Intl. (ORD) Some flights may connect through major hubs like Gardermoen (OSL), Schiphol (AMS), Kastrup (CPH) before reaching Chicago. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) at the last minute?
Typically, booking a last minute flight from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) flight and hotel package?
Securing a Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) Chicago Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.)?
If you booked your Trondheim (TRD-Vaernes) to Chicago, IL (ORD-O'Hare Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Vaernes
Destination airport
O'Hare Intl.
Airlines serving
Finnair, Lufthansa, Scandinavian Airlines
Roundtrip price
$685
Distance
3925 mi

Book with confidence

Trondheim to Chicago Flights

The cheapest times to fly from Trondheim to Chicago

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Trondheim to Chicago are during the month of May. You can find some of the cheapest flights from Trondheim to Chicago with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Trondheim to Chicago

Sunday is one of the best days to book for cheap flights from Trondheim to Chicago: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Trondheim to Chicago

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Trondheim to Chicago in 2026. You can also book with separate airlines for your outbound and return journeys, from $427 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Trondheim to Chicago flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Trondheim to Chicago airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Trondheim to Chicago Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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