What are the cheapest airlines flying from St. Louis to Oslo round-trip?

United Airlines, at $542, was found to be the cheapest airline from St. Louis to Oslo.Alternate airlines to your destination round-trip include Lufthansa and British Airways. United Airlines is 42% cheaper than the average price of flights available within the next 90 days to this destination.

In terms of precipitation, rainfall in Oslo ranges from 1.6 - 3.5 inches per month. August is typically the wettest month, when rainfall can reach 3.5 in. February is typically the driest time to visit Oslo when rainfall is around 1.6 in.

If weather is an important factor for your trip to Oslo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.6 F).

What are the most popular airlines that fly from St. Louis to Oslo?

Before booking your flight from St. Louis to Oslo check out the most popular airlines for this route: Lufthansa, KLM or United Airlines.

What is the cheapest time of day to fly from STL to OSL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Oslo as you normally would.

What airport do you fly from for flights from St. Louis to Oslo?

If you book a flight to Oslo from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from Lambert-St Louis to Oslo per day from 4 different airlines.

Can I find deals for flights from St. Louis to Oslo that include hotel bookings?

Yes. In addition to deals on St. Louis to Oslo flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Oslo?

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

Can I find deals for business class flights from St. Louis to Oslo?

Yes. Cheapflights offers flight deals from St. Louis to Oslo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Find flight deals from St. Louis to Oslo

Popular in	December
Cheapest in	November
Average price	$880

Highest demand for flights based on searches. 6% potential increase in price ($70 potential increase over avg. RT price).

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Cheapest flight prices on average. 8% potential price decrease ($76 potential savings vs. average RT price).

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Average for round-trip flights in September 2026

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Best time to book a flight from St. Louis to Oslo

Have a flexible travel schedule? Discover the best time to fly to Oslo from St. Louis with our price prediction graph.

STL-OS1

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.

Reviews of airlines servicing Oslo

Peruse reviews from past customers who have flown with KLM,United Airlines, andLufthansa from St. Louis to Oslo to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

KLM

7.8

Good

1,576 reviews

Reviews

1 / 20

8.0

Excellent

Meghana,Aug 2026

QRO - ATL

It was a good one. They were very friendly and helpful

KLM

7.8

Good

1,576 reviews

KLM

7.8

Good

1,576 reviews

Reviews

1 / 20

8.0

Excellent

Meghana,Aug 2026

QRO - ATL

It was a good one. They were very friendly and helpful

United Airlines

7.4

Good

10,244 reviews

KLM

7.8

Good

1,576 reviews

Reviews

1 / 20

8.0

Excellent

Meghana,Aug 2026

QRO - ATL

It was a good one. They were very friendly and helpful

Lufthansa

6.8

Okay

8,240 reviews

KLM

7.8

Good

1,576 reviews

Reviews

1 / 20

8.0

Excellent

Meghana,Aug 2026

QRO - ATL

It was a good one. They were very friendly and helpful

British Airways

6.7

Okay

8,233 reviews

KLM

7.8

Good

1,576 reviews

Reviews

1 / 20

8.0

Excellent

Meghana,Aug 2026

QRO - ATL

It was a good one. They were very friendly and helpful

Related info for your journey

What airport do you fly from for flights from St. Louis to Oslo?
If you book a flight to Oslo from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from Lambert-St Louis to Oslo per day from 4 different airlines.
What are the cheapest airlines flying from St. Louis to Oslo round-trip?
United Airlines, at $542, was found to be the cheapest airline from St. Louis to Oslo.Alternate airlines to your destination round-trip include Lufthansa and British Airways. United Airlines is 42% cheaper than the average price of flights available within the next 90 days to this destination.
Can I find deals for flights from St. Louis to Oslo that include hotel bookings?
Yes. In addition to deals on St. Louis to Oslo flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Oslo?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Oslo.
Can I find deals for business class flights from St. Louis to Oslo?
Yes. Cheapflights offers flight deals from St. Louis to Oslo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Top 4 airlines flying from St. Louis to Oslo

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$542	Average$918	FlexibilityNo cancel fee	On-time69%
Lufthansa	Cheapest$617	Average$887	FlexibilityNo cancel fee	On-time76%
British Airways	Cheapest$656	Average$761	FlexibilityNo cancel fee	On-time70%
KLM	Cheapest$685	Average$794	FlexibilityNo cancel fee	On-time75%

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Find cheap flights from St. Louis to Oslo with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from St. Louis to Oslo

Popular in

Cheapest in

Average price

Best time to book a flight from St. Louis to Oslo

Have a flexible travel schedule? Discover the best time to fly to Oslo from St. Louis with our price prediction graph.

Reviews of airlines servicing Oslo

Get insights into the airlines that provide service to Oslo. 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 Oslo. Reviews last updated September 26, 2026.

Peruse reviews from past customers who have flown with KLM,United Airlines, andLufthansa from St. Louis to Oslo to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly from for flights from St. Louis to Oslo?

What are the cheapest airlines flying from St. Louis to Oslo round-trip?

Can I find deals for flights from St. Louis to Oslo that include hotel bookings?

How can I find direct flights from St. Louis to Oslo?

Can I find deals for business class flights from St. Louis to Oslo?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Oslo

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Oslo by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from St. Louis to Oslo by cabin class

Find flights from St. Louis to Oslo, based on your preferred cabin class, be it economy, premium economy, business, or first class.

St. Louis and Oslo flights

Browse other St. Louis and Oslo flight options. Last updated on September 26, 2026.

Other flights from St. Louis

Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on September 26, 2026.

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Top 4 airlines flying from St. Louis to Oslo

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Cheap flights from St. Louis (STL) to Oslo

Find cheap flights from St. Louis to Oslo with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from St. Louis to Oslo

Popular in

Cheapest in

Average price

Best time to book a flight from St. Louis to Oslo

Have a flexible travel schedule? Discover the best time to fly to Oslo from St. Louis with our price prediction graph.

Reviews of airlines servicing Oslo

Peruse reviews from past customers who have flown with KLM,United Airlines, andLufthansa from St. Louis to Oslo to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly from for flights from St. Louis to Oslo?

What are the cheapest airlines flying from St. Louis to Oslo round-trip?

Can I find deals for flights from St. Louis to Oslo that include hotel bookings?

How can I find direct flights from St. Louis to Oslo?

Can I find deals for business class flights from St. Louis to Oslo?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Oslo

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Oslo by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from St. Louis to Oslo by cabin class

Find flights from St. Louis to Oslo, based on your preferred cabin class, be it economy, premium economy, business, or first class.

St. Louis and Oslo flights

Browse other St. Louis and Oslo flight options. Last updated on September 26, 2026.

Other flights from St. Louis

Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on September 26, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Top 4 airlines flying from St. Louis to Oslo

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Travel Smart