Cheap flights from St Louis to Osaka

Compare St Louis to Osaka flight deals

Find the cheapest month or even day of the year to fly to Osaka

Book the best Osaka fare with no extra fees

Flight deals from St Louis Airport to Osaka

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Osaka? If you want to travel next month, return fares start from $1,605. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Osaka

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Osaka flights are currently cheapest in September.

Alternative St Louis to Osaka routes

Looking for the cheapest, fastest or easiest route from St Louis to Osaka? You could fly into the following airports instead.

St Louis to Osaka: Flight information

The things to know before you go.
Cheapest flight found$671
Cheapest month to flySeptember

Finding cheap flights from St Louis to Osaka: Frequently asked questions

There are 3 airports in Osaka: Itami Domestic (Osaka), Kobe and Kansai International (Osaka).
The best price we found for a return flight from St Louis to Osaka is $1,265. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Osaka. But we found flights with one or more stops from $1,265.
As of March 2026, there are no flights flying from St Louis to Osaka.
The cheapest month to fly from St Louis to Osaka is usually September.
If you're flying from St Louis Airport, the cheapest airport near Osaka is Kansai International (Osaka) – which is 38.0 km away from the centre of Osaka. We've found flights into this airport from $1,265.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Osaka on Tuesday, 1 September 2026.
No airlines currently offer direct flights between St Louis Airport and Osaka. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Osaka but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Osaka is around 40 days in advance, so don’t leave your flight to the last minute.
In March, the average temperature is usually around 7°C. August is typically the warmest month in Osaka, when it usually averages around 30°C. You can expect the least rain in December. The coldest month is January, with temperatures averaging 0°C. The rainiest month is June.
Currently, United offers the cheapest flight tickets to Osaka.

Flying from Lambert-St. Louis International Airport (STL) to Osaka: what you need to know

  • Osaka is 14 hours ahead of St Louis, where Lambert-St. Louis International Airport is located. Osaka runs on the UTC+9 timezone.

  • For a stress-free journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. That way, you won't have to rush to catch your STL to Osaka flight.

  • Taking off during a peak period like public or school holidays? Expect longer lines at check-in and security. To play it safe, arrive up to four hours before international flights and two hours before domestic departures.

  • Finding a plane ticket from STL to Osaka with a stopover is a breeze. Whether you want to potentially save on your fare or visit a new city, just deselect 'Direct flights only' to check out your options. A popular stop is Los Angeles International Airport (LAX).

  • STL is around 16 kilometres from central St Louis. If you're driving, ride-sharing or catching a cab from the centre, it'll take 20 minutes or so to get there, depending on traffic. If you're using public transport, expect the travel time to be around 35 minutes.

  • Want a stress-free start to your trip? Stay near STL. Whether you're catching an early flight from Lambert-St. Louis International Airport to Osaka or just don't like being rushed, these hotels are a convenient choice:

  • 78.04% of flights that depart Lambert-St. Louis International Airport reach their destination on time.

  • STL is located at 10701 Lambert International Blvd..

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Osaka

  • $671 is currently the best price for a one-way Lambert-St. Louis International Airport to Osaka flight. Return plane tickets start from $1,265. These prices can change based on demand and availability.

  • Don't leave everything to the last minute. You're more likely to pick up cheap flights from STL to Osaka if you book in advance. Airlines often have some amazing early bird discounts.

  • If you can be flexible with your travel plans, make the most of the 'Whole month' tool. It'll give you the lowest price across each month when looking for your Lambert-St. Louis International Airport to Osaka ticket.

  • Stay on top of deals for cheap flights from STL to Osaka by setting up a Price Alert. We'll send you an email or notification through the app when a lower fare becomes available.

  • Tailor your trip with filters. Select your preferred departure and arrival times, total journey duration and airlines. You can also sort the results by 'Cheapest,' 'Best' or 'Fastest' flights from Lambert-St. Louis International Airport to Osaka.

Airports in Osaka

Kansai International Airport (KIX)

  • The distance from Kansai International Airport (KIX) to central Osaka is roughly 48 kilometres. It takes around 45 minutes to get to the centre driving.

  • Few things beat the convenience of staying close to the terminal if you've just hopped off a late flight from Lambert-St. Louis International Airport to Osaka. First Cabin Kansai Airport and Hotel Nikko Kansai Airport - 3 Mins Walk to the Airport are handy options near KIX.

  • Fast-track your adventure by picking up a Kansai International Airport rental car. Grab a set of wheels from BEST KANSAI CAR RENTAL, BE KOBE or TravelCar and explore beyond Osaka's main sights.

  • To lock in the lowest rate, reserve your ride from Kansai International Airport a few weeks ahead of your flight from STL to Osaka. Prices typically increase closer to the day of travel.

  • You'll find KIX at 1 Senshukukokita, Izumisano.

Itami Airport (ITM)

  • The centre of Osaka is about 16 kilometres from Itami Airport (ITM). After your flight from Lambert-St. Louis International Airport to Osaka has touched down and you've made your way out of the airport, the drive should be around 20 minutes.

  • There are some great places to rest your head close to ITM. Tuck yourself in and get cosy after your STL to Osaka flight at any of these well-located options:

  • Forget about public transport schedules or cab lines. Grab an Itami Airport rental car and take your trip in whatever direction you choose. Compare rates and availability from Europcar, Times and Rakuten.

  • Avoid the long lines and paperwork at the rental desk by completing your booking beforehand. Secure your ride from ITM in advance so you can simply grab the keys and be on your way.

  • The address for Itami Airport is 3丁目555 Nishimachi, Hotarugaike, Toyonaka.

Kobe Airport (UKB)

  • Step off your flight from Lambert-St. Louis International Airport to Osaka and head straight for your hotel or start taking in the sights right away. Central Osaka is around 40 kilometres from Kobe Airport (UKB) and usually takes 45 minutes to drive there.

  • If you don't want to make the trip to the centre, find a hotel near UKB. Make yourself comfy at one of these stays after your STL to Osaka flight:

  • Begin your trip without stressing over how to arrive at your destination with a Kobe Airport rental car. Find your perfect set of wheels with trusted companies here like Europcar, Times and Rakuten.

  • If you're looking for a particular model or make, booking early gives you a better shot at snagging what you want. Reserve your ride from UKB at least a few weeks ahead of your flight from Lambert-St. Louis International Airport to Osaka.

  • Kobe Airport's street address is 1 Kobekuko, Chuo Ward.

Best time to go to Osaka

  • Visit Osaka during the high season if you want a lively atmosphere, but remember that prices are typically higher. Alternatively, book flights from Lambert-St. Louis International Airport to Osaka during low season when prices are cheaper and crowds are smaller.

  • Before locking in your Lambert-St. Louis International Airport to Osaka plane ticket, think about what kind of weather you prefer. August is the warmest month in Osaka, with temperatures ranging from 21ºC (70ºF) to 34ºC (93ºF).

  • January has average temperatures of between 0ºC (32ºF) and 10ºC (50ºF). Search for a cheap ticket from STL to Osaka around that time if you want to travel when it's cooler.

More about Osaka

Explore more of Japan

  • Yokohama is just one of the many cities in Japan waiting to be explored once you've seen the sights of Osaka. Around 386 kilometres away to the east, well-known attractions include Teishoin, Seya Christian Church and Banfukuji.

  • Around 137 kilometres north-east of Osaka, Nagoya is another favourite stop in Japan. Experience major highlights starting with Nagoya Castle, Atsuta Shrine and Osu Kannon Temple.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.