HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Osaka

$379+ Cheap flights from St. Louis (STL) to Osaka (OSA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OSA
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Osaka with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Osaka

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Osaka (OSA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$682
(EaseMyTrip)

One-way from

$379
(FlightHub)

Popular in

May

Cheapest in

September
Provider with most accurate pricing for Lambert-St Louis-Osaka (OSA) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Osaka (OSA) flights.
Search Deals
From Lambert-St Louis to Osaka (OSA)
Search Deals
One-way flight from Lambert-St Louis to Osaka (OSA)
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($168 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($61 potential savings vs. average RT price).
Search Deals

Find flight deals from St. Louis to Osaka

Cheapest flights from St. Louis to Osaka
Explore the most affordable flight options available from St. Louis to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 26, 2025.

This Air Canada deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:05 pmSTL - KIX
2 stops39h 15mMultiple Airlines
Wed 12/103:00 pmKIX - STL
2 stops39h 29mMultiple Airlines
Deal found 11/24$792
This FlightHub deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:15 amSTL - ITM
2 stops23h 05mANA
Wed 12/108:00 amITM - STL
2 stops24h 03mANA
Deal found 11/24$831
This United Airlines deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:37 pmSTL - KIX
2 stops33h 03mUnited Airlines
Wed 12/106:35 pmKIX - STL
3 stops36h 05mUnited Airlines
Deal found 11/24$847
This Ovago deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:55 amSTL - KIX
1 stop20h 55mJapan Airlines
Sat 12/205:50 pmKIX - STL
1 stop21h 01mJapan Airlines
Deal found 11/24$894
This United Airlines deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:45 pmSTL - KIX
2 stops32h 55mUnited Airlines
Sat 12/206:35 pmKIX - STL
2 stops18h 47mUnited Airlines
Deal found 11/24$896
This American Airlines deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:00 amSTL - KIX
1 stop20h 50mAmerican Airlines
Wed 12/105:50 pmKIX - STL
1 stop21h 07mAmerican Airlines
Deal found 11/24$947
This FlightHub deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/88:00 amSTL - KIX
2 stops23h 20mANA
Sat 12/207:00 pmKIX - STL
2 stops39h 18mANA
Deal found 11/25$975
This American Airlines deal was found by Cheapflights users on 11/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:55 amSTL - KIX
1 stop20h 55mAmerican Airlines
Sat 12/205:50 pmKIX - STL
1 stop21h 01mAmerican Airlines
Deal found 11/26$984
This oojo deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:58 pmSTL - KIX
3 stops29h 57mCathay Pacific
Wed 12/104:15 pmKIX - STL
3 stops46h 42mCathay Pacific
Deal found 11/24$1,451
This KAYAK deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:00 amSTL - ITM
2 stops21h 55mJapan Airlines
Fri 1/28:30 amITM - STL
2 stops30h 21mJapan Airlines
Deal found 11/24$2,217
This FlightHub deal was found by Cheapflights users on 11/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/51:00 pmSTL - ITM
2 stops27h 30mANA
Fri 1/22:00 pmITM - STL
2 stops20h 18mANA
Deal found 11/26$2,530

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Osaka that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 26, 2025.
Use the filters below to find and compare flights from St. Louis to Osaka that are best for you.

Fly from

St. Louis

Fly to

Osaka

Route

Depart

Return

Price

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/3

11:20 am-8:10 am

2 stops29h 50m

Osaka Itami

Thu 2/19

7:30 am-12:25 pm

2 stops19h 55m

$689

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 2/16

6:00 am-6:10 pm

2 stops21h 10m

Osaka Itami

Thu 2/26

1:00 pm-8:23 pm

2 stops22h 23m

$701

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 2/16

6:00 am-6:10 pm

2 stops21h 10m

Osaka Itami

Tue 3/3

1:00 pm-10:00 pm

2 stops24h 00m

$702

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/10

7:15 am-7:55 pm

2 stops21h 40m

Osaka Itami

Fri 3/6

1:40 pm-7:25 pm

2 stops20h 45m

$707

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

9:55 am-6:10 pm

2 stops41h 15m

Osaka Itami

Wed 2/25

1:00 pm-10:00 pm

2 stops24h 00m

$707

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

9:55 am-6:10 pm

2 stops41h 15m

Osaka Itami

Tue 3/3

1:00 pm-7:19 pm

2 stops21h 19m

$707

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

6:30 am-6:10 pm

2 stops44h 40m

Osaka Itami

Mon 3/2

1:00 pm-10:59 pm

2 stops24h 59m

$708

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 2/14

9:55 am-4:40 pm

2 stops39h 45m

Osaka Kansai Intl

Wed 2/25

6:35 pm-10:00 pm

2 stops18h 25m

$719

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/17

8:41 am-4:40 pm

2 stops64h 59m

Osaka Kansai Intl

Mon 3/2

6:35 pm-9:23 am

2 stops29h 48m

$720

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:45 pm-4:40 pm

2 stops54h 55m

Osaka Kansai Intl

Sat 2/28

6:35 pm-12:25 pm

2 stops32h 50m

$720

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 38 results
1
2
3
4

Compare providers for flights from St. Louis to Osaka

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Osaka in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Osaka flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Osaka flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Osaka flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Osaka flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Osaka flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Osaka

How much does it cost to fly round-trip from St. Louis to Osaka?

Reviews of airlines servicing Osaka

Get insights into the airlines that provide service to Osaka. 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 Osaka. Reviews last updated November 26, 2025.
Read through reviews of airlines operating flights from St. Louis to Osaka, such as ANA, Japan Airlines, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
1,010 reviews

Crew

8.7

Entertainment

7.9

Overall

8.4

Comfort

8.2

Food

7.7

Boarding

8.6

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
ANA
8.4
Very good
1,010 reviews
ANA
8.4
Very good
1,010 reviews

Crew

8.7

Entertainment

7.9

Overall

8.4

Comfort

8.2

Food

7.7

Boarding

8.6

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Japan Airlines
8.3
Very good
1,630 reviews
ANA
8.4
Very good
1,010 reviews

Crew

8.7

Entertainment

7.9

Overall

8.4

Comfort

8.2

Food

7.7

Boarding

8.6

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
United Airlines
7.4
Good
9,046 reviews
ANA
8.4
Very good
1,010 reviews

Crew

8.7

Entertainment

7.9

Overall

8.4

Comfort

8.2

Food

7.7

Boarding

8.6

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Osaka. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Osaka from St. Louis. Booking flights from Lambert-St Louis (STL) to Osaka should be relatively easy as there are 0 daily outbound flights to Osaka from 1 airline.

  • How long is the flight from St. Louis to Osaka?

    For as low as $701, ANA can have you in Osaka from St. Louis in 21h 10m. Airlines will cover a distance of 6568 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from St. Louis to Osaka round-trip?

    According to our current data, Japan Airlines ($723), offers the cheapest pricing from St. Louis to Osaka. Users have found that Japan Airlines is 41% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from St. Louis to Osaka one-way?

    $379 is the cheapest one-way deal found within the past few days, from ANA. You may also be able to find cheap deals on United Airlines and Japan Airlines, with prices starting from $399 and $447, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Osaka 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

Traveling to a place near Osaka?

Book flights to Osaka if you plan to visit one of these locations
Nara
Nishinomiya

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 Osaka

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Kansai Intl flights
Kansas City to Kansai Intl flights
Kansas City to Osaka Itami flights

Top airline flying from St. Louis to Osaka

Discover the top airline that operate flights from St. Louis to Osaka. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest$723Average$813FlexibilityNo cancel feeOn-time79%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.