Cheap flights from Chicago to Oslo from $299

The cheapest month to fly to Oslo Gardermoen Airport from Chicago is in January. Flight prices, which tend to average around $420, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Oslo Gardermoen Airport from Chicago during November instead. Flights to Oslo Gardermoen Airport in November, while not as cheap as those in January, still average around $450.

You are more likely to see cheaper flights to Oslo Gardermoen Airport from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Oslo Gardermoen Airport for around $594 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Oslo Gardermoen Airport from Chicago for as low as $510 on momondo.

You could potentially save up to 87% on your flight if you consider stops on a Chicago to Oslo Gardermoen Airport flight.

As of April 2026, prices for Chicago to Oslo Gardermoen Airport flights are approximately 36% cheaper when compared to flights at the same time last year.

Delta, British Airways, and SWISS are the most popular carriers operating from Chicago to Oslo Gardermoen

Icelandair, Scandinavian Airlines and United Airlines are the top three most popular airlines that fly to Oslo Gardermoen Airport from Chicago according to our data. Icelandair is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Oslo Gardermoen Airport. Keep in mind that there are 9 different airlines that fly to Oslo Gardermoen Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 33% of flights between Chicago and Oslo have experienced a delay on any given week. The average delay length over the past 12 months has been 247 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Saturday has historically seen more delays on average compared to the rest of the week.

According to our data, Atlas Air have had the least number of delays on this route over the last 12 months; with about 39% of their flights experiencing any sort of delay.

Reykjavik (KEF) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

Flights via Helsinki (HEL) offer the lowest average round-trip price of $541.

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 10h 04m.

Helsinki (HEL) has the shortest average layover time for this route: 1h 33m.