In terms of precipitation, rainfall in Interlaken ranges from 2.5 - 5.0 inches per month. June is typically the wettest month, when rainfall can reach 5.0 in. January is typically the driest time to visit Interlaken when rainfall is around 2.5 in.

If weather is an important factor for your trip to Interlaken, 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 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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

Consider United Airlines, Lufthansa or Delta when booking your flight. These represent the most popular airlines when flying from St. Louis to Interlaken.

What is the cheapest time of day to fly from STL to IN9?

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

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

Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Interlaken. On average, Lambert-St Louis has 0 outbound flights to Interlaken per day from 6 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

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

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

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

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

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

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

Find Cheap Flights from St. Louis to Interlaken

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Find flight deals from St. Louis to Interlaken

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	December
Cheapest in	February
Average price	$804

Provider with most accurate pricing for Lambert-St Louis-Zurich flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Zurich flights.

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Highest demand for flights based on searches. 10% potential increase in price ($121 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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Reviews of airlines servicing Interlaken

Read reviews from past customers who have flown Delta,United Airlines, andAir Canada from St. Louis to Interlaken. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.8

Good

8,691 reviews

Reviews

1 / 20

6.0

Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Delta

7.8

Good

8,691 reviews

Delta

7.8

Good

8,691 reviews

Reviews

1 / 20

6.0

Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

United Airlines

7.3

Good

10,453 reviews

Delta

7.8

Good

8,691 reviews

Reviews

1 / 20

6.0

Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Air Canada

7.1

Good

11,831 reviews

Delta

7.8

Good

8,691 reviews

Reviews

1 / 20

6.0

Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Lufthansa

6.8

Okay

8,297 reviews

Delta

7.8

Good

8,691 reviews

Reviews

1 / 20

6.0

Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

British Airways

6.7

Okay

8,275 reviews

Delta

7.8

Good

8,691 reviews

Reviews

1 / 20

6.0

Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Related info for your journey

What airport do you fly from for flights from St. Louis to Interlaken?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Interlaken. On average, Lambert-St Louis has 0 outbound flights to Interlaken per day from 6 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
Can I find deals for flights from St. Louis to Interlaken that include hotel bookings?
Yes. In addition to deals on St. Louis to Interlaken flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Interlaken?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Interlaken.
Can I find deals for business class flights from St. Louis to Interlaken?
Yes. Cheapflights offers flight deals from St. Louis to Interlaken 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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Top 6 airlines flying from St. Louis to Interlaken

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$460	Average$762	FlexibilityNo cancel fee	On-time70%
United Airlines	Cheapest$501	Average$994	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$503	Average$1,182	FlexibilityNo cancel fee	On-time71%
Lufthansa	Cheapest$526	Average$932	FlexibilityNo cancel fee	On-time76%
Delta	Cheapest$594	Average$1,154	FlexibilityNo cancel fee	On-timeN/A
Air Canada	Cheapest$727	Average$1,088	FlexibilityNo cancel fee	On-time67%

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Find cheap flights from St. Louis to Interlaken 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 Interlaken

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Reviews of airlines servicing Interlaken

Read reviews from past customers who have flown Delta,United Airlines, andAir Canada from St. Louis to Interlaken. Users can see the overall rating for each airline as well as how each is rated 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 Interlaken?

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

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

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

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 Interlaken

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

Complete your trip

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

Search flights from St. Louis to Interlaken by cabin class

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

St. Louis and Interlaken flights

Browse other St. Louis and Interlaken flight options. Last updated on October 30, 2026.

Other flights from St. Louis

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St. Louis to Interlaken flights

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Top 6 airlines flying from St. Louis to Interlaken

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Cheap flights from St. Louis (STL) to Interlaken, Switzerland

Find cheap flights from St. Louis to Interlaken 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 Interlaken

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Reviews of airlines servicing Interlaken

Read reviews from past customers who have flown Delta,United Airlines, andAir Canada from St. Louis to Interlaken. Users can see the overall rating for each airline as well as how each is rated 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 Interlaken?

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

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

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

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 Interlaken

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

Complete your trip

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

Search flights from St. Louis to Interlaken by cabin class

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

St. Louis and Interlaken flights

Browse other St. Louis and Interlaken flight options. Last updated on October 30, 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 October 30, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

St. Louis to Interlaken flights

Consider these flights traveling from St. Louis to Interlaken.

Top 6 airlines flying from St. Louis to Interlaken

100% Free

Book with Flexibility

Travel Smart