The cheapest times to fly from STL to OSL are

  • January 1st to March 25th (except the week of March 5th)
  • August 20th to December 9th (except the weeks of August 27th and September 17th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from STL to OSL is early to mid October. Prices can be as high as $1630 for Saturday flights during early August, or as low as $757 for Tuesday flights around early to mid October.


When to Fly to Oslo

Flying from St. Louis, MO (STL) to Oslo (OSL) will usually cost between $912 to $1414 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid October with an average ticket price of $898. Due to high demand the most expensive time to fly is early August, with an average price of $1413. Planning your trip to low-cost times can easily save you $515 on economy flights and even more on first-class flights. Generally, any price below $1112 can be considered a good price for a round-trip STL to OSL flight.

See below for a graph of average weekly prices for the STL to OSL route. All prices are for round-trip tickets in USD.

STL to OSL Flight Prices

Compared to other flights, the STL to OSL flight is slightly more expensive than the average and costs slightly more than the average flight leaving from St. Louis. The average price per mile (for a direct flight) is $0.16, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $155 (12%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1019. Return trip prices are from the OSL to STL flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from STL to OSL can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 8 hour 43 minutes may not be realistic.


Flight Hacking STL to OSL

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from STL to OSL — but Champion Traveler does!

Hack #1: New York, NY (STL > JFK > OSL)

  • Price for both tickets: $669
  • Average savings: $443 (39.81%)

See STL to JFK flights

Hack #2: Chicago, IL (STL > ORD > OSL)

  • Price for both tickets: $711
  • Average savings: $401 (36.08%)

See STL to ORD flights

Hack #3: Boston, MA (STL > BOS > OSL)

  • Price for both tickets: $724
  • Average savings: $388 (34.91%)

See STL to BOS flights


Flight Questions Answered

Still have questions about flying from STL to OSL? We’ve got answers.

Which airlines fly this route?

You can find 20 major airlines flying this route most often: Air Canada, Air France, Alaska, American, Austrian, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, LOT, Lufthansa, Royal Jordanian, SAS, SWISS, Tap Air Portugal, Turkish Airlines, United, and potentially more during busy seasons.

How far away is it from Gardermoen Airport to St Louis Lambert International Airport?

The distance between the two airports is roughly 4298 miles or 6917 kilometers.

How long does it take to fly from STL to OSL?

The real-world flight time for a nonstop STL to OSL flight is about 8 hour 43 minutes.

How many flights go between St. Louis, MO and Oslo?

It depends on the day of the week and the date, but a typical day might have around 85 available flights from STL to OSL.


Airport Location Info


Departing Airport

Origination codeSTL
Origination airport nameSt Louis Lambert International Airport
CitySt. Louis, MO
Countrythe United States

Return Airport

Destination codeOSL
Destination airport nameGardermoen Airport


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.