$540 Cheap Flights from St. Louis (STL) to Bengaluru (BLR)

View $540 flight on Tue, Aug 12, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Kempegowda Intl. Airport (BLR)

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Cheap Flights from St. Louis to Bengaluru (STL-BLR)

Prices were available within the past 7 days and start at $540 for one-way flights and $1,074 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Oct 20 - Thu, Nov 20
STL
St. Louis
BLR
Bengaluru
$1,074 Roundtrip, found 18 hours ago
$1,074
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Mon, Oct 20 from St. Louis to Bengaluru, returning Thu, Nov 20, priced at $1,074 found 18 hours ago
American Airlines
Mon, Oct 20 - Thu, Nov 20
STL
St. Louis
BLR
Bengaluru
$1,080 Roundtrip, found 18 hours ago
$1,080
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Mon, Oct 20 from St. Louis to Bengaluru, returning Thu, Nov 20, priced at $1,080 found 18 hours ago
American Airlines
Mon, Oct 20 - Thu, Nov 20
STL
St. Louis
BLR
Bengaluru
$1,081 Roundtrip, found 18 hours ago
$1,081
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Mon, Oct 20 from St. Louis to Bengaluru, returning Thu, Nov 20, priced at $1,081 found 18 hours ago
Air Canada
Mon, Sep 1 - Wed, Sep 17
STL
St. Louis
BLR
Bengaluru
$1,092 Roundtrip, found 2 days ago
$1,092
Roundtrip
found 2 days ago
Select Air Canada flight, departing Mon, Sep 1 from St. Louis to Bengaluru, returning Wed, Sep 17, priced at $1,092 found 2 days ago
Air Canada
Wed, Oct 8 - Mon, Oct 27
STL
St. Louis
BLR
Bengaluru
$1,095 Roundtrip, found 2 days ago
$1,095
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Oct 8 from St. Louis to Bengaluru, returning Mon, Oct 27, priced at $1,095 found 2 days ago
Air Canada
Mon, Oct 20 - Wed, Nov 19
STL
St. Louis
BLR
Bengaluru
$1,098 Roundtrip, found 18 hours ago
$1,098
Roundtrip
found 18 hours ago
Select Air Canada flight, departing Mon, Oct 20 from St. Louis to Bengaluru, returning Wed, Nov 19, priced at $1,098 found 18 hours ago
Air Canada
Mon, Oct 13 - Mon, Oct 27
STL
St. Louis
BLR
Bengaluru
$1,108 Roundtrip, found 2 days ago
$1,108
Roundtrip
found 2 days ago
Select Air Canada flight, departing Mon, Oct 13 from St. Louis to Bengaluru, returning Mon, Oct 27, priced at $1,108 found 2 days ago
Lufthansa
Tue, Jan 20 - Tue, Feb 3
STL
St. Louis
BLR
Bengaluru
$1,134 Roundtrip, found 6 days ago
$1,134
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Tue, Jan 20 from St. Louis to Bengaluru, returning Tue, Feb 3, priced at $1,134 found 6 days ago
Qatar Airways
Tue, Sep 2 - Thu, Sep 25
STL
St. Louis
BLR
Bengaluru
$1,188 Roundtrip, found 5 days ago
$1,188
Roundtrip
found 5 days ago
Select Qatar Airways flight, departing Tue, Sep 2 from St. Louis to Bengaluru, returning Thu, Sep 25, priced at $1,188 found 5 days ago
Delta
Fri, Sep 26 - Fri, Oct 10
STL
St. Louis
BLR
Bengaluru
$1,236 Roundtrip, found 2 days ago
$1,236
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Sep 26 from St. Louis to Bengaluru, returning Fri, Oct 10, priced at $1,236 found 2 days ago
Flights from St. Louis (STL) to Bengaluru (BLR)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Kempegowda Intl.
Airlines serving
Air Canada, Air France, British Airways, Cathay Pacific, Delta, Japan Airlines, KLM, Lufthansa, Qatar Airways, Virgin Atlantic
Roundtrip price
$1,074
Distance
8765 mi

St. Louis to Bengaluru Flights

The cheapest times to fly from St. Louis to Bengaluru

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 St. Louis to Bengaluru are during the month of October. You can find some of the cheapest flights from St. Louis to Bengaluru with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Bengaluru

Sunday is one of the best days to book for cheap flights from St. Louis to Bengaluru: 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 St. Louis to Bengaluru

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 St. Louis to Bengaluru in 2025. You can also book with separate airlines for your outbound and return journeys, from $540 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 St. Louis to Bengaluru 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 St. Louis to Bengaluru 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.

 

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Kempegowda Intl. Airport (BLR) cost?
Discover the latest flight deals from STL to BLR by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from STL to BLR?
The cheapest flights from STL to BLR are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from STL to BLR?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to BLR. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Kempegowda Intl. Airport (BLR)?
You'll need to catch a flight with a layover when traveling from Lambert-St. Louis Intl. Airport (STL) to Kempegowda Intl. Airport (BLR). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from STL to BLR?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Kempegowda Intl. Airport (BLR)?
Opt for a flight from Lambert-St. Louis Intl. Airport (STL) to Kempegowda Intl. Airport (BLR) that leaves before 3 PM to reduce the risk of cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Kempegowda Intl. Airport (BLR) last-minute?
Last-minute bookings from STL to BLR are generally more expensive. To lock in the lowest prices, start searching for flights ahead of time. That being said, if you're flexible with your travel dates, you may land a cheap fare right before your trip.
Is it cheaper to book a STL to BLR flight and hotel package?
You can save money by securing a STL to BLR flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. Once you've selected your ideal flights and accommodations, consider other add-ons like activities, car rentals and tours.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Kempegowda Intl. Airport (BLR)?
If you reserved your STL to BLR flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

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*Available to One Key members.