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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 20 — Dec 271
Sat 12/20
Sat 12/27
1 adult, Economy
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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 20, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$654
(Bravofly)

One-way from

$379
(FlightHub)

Popular in

May

Cheapest in

September
Provider with most accurate pricing for Lambert-St Louis-Osaka (OSA) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Osaka (OSA) flights.
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From Lambert-St Louis to Osaka (OSA)
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One-way flight from Lambert-St Louis to Osaka (OSA)
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Highest demand for flights based on searches. 12% potential increase in price ($168 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($61 potential savings vs. average RT price).
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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 20, 2025.

This United Airlines deal was found by Cheapflights users on 11/18. 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 stops30h 14mUnited Airlines
Deal found 11/18$833
This Air Canada deal was found by Cheapflights users on 11/20. 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.
Mon 12/84:05 pmSTL - KIX
2 stops39h 15mMultiple Airlines
Sat 12/203:00 pmKIX - STL
2 stops39h 29mMultiple Airlines
Deal found 11/20$854
This FlightHub deal was found by Cheapflights users on 11/19. 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 12/86:55 amSTL - KIX
1 stop20h 55mJapan Airlines
Sat 12/207:00 amKIX - STL
2 stops24h 46mJapan Airlines
Deal found 11/19$876
This oojo deal was found by Cheapflights users on 11/19. 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.
Thu 11/208:39 amSTL - KIX
2 stops37h 06mCathay Pacific
Thu 11/277:05 pmKIX - STL
2 stops38h 45mCathay Pacific
Deal found 11/19$1,265
This Gurufare deal was found by Cheapflights users on 11/19. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:30 pmSTL - KIX
2 stops28h 15mCathay Pacific
Sat 12/204:15 pmKIX - STL
3 stops45h 41mCathay Pacific
Deal found 11/19$1,501
This Booking.com deal was found by Cheapflights users on 11/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:30 amSTL - ITM
2 stops38h 40mANA
Thu 11/2711:00 amITM - STL
2 stops40h 28mANA
Deal found 11/19$1,629
This Justfly.com deal was found by Cheapflights users on 11/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/202:17 pmSTL - ITM
2 stops33h 23mJapan Airlines
Thu 11/278:25 amITM - STL
2 stops23h 00mJapan Airlines
Deal found 11/19$1,723
This CheapOair deal was found by Cheapflights users on 11/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:55 amSTL - ITM
2 stops22h 10mJapan Airlines
Fri 1/27:25 amITM - STL
2 stops31h 26mJapan Airlines
Deal found 11/19$1,882
This Ovago deal was found by Cheapflights users on 11/19. 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.
Thu 11/206:00 amSTL - ITM
3 stops46h 50mWestJet
Thu 11/272:40 pmITM - STL
3 stops47h 43mWestJet
Deal found 11/19$2,305
This Ovago deal was found by Cheapflights users on 11/18. 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.
Fri 12/51:00 pmSTL - ITM
2 stops27h 30mANA
Fri 1/22:00 pmITM - STL
2 stops20h 18mANA
Deal found 11/18$2,564

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 20, 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-7:30 am

2 stops29h 10m

Osaka Itami

Thu 2/19

8:00 am-12:25 pm

2 stops19h 25m

$689

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

7:41 am-6:55 pm

2 stops20h 14m

Osaka Itami

Sat 2/28

1:00 pm-7:19 pm

2 stops21h 19m

$690

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 2/18

6:00 am-8:35 pm

2 stops23h 35m

Osaka Itami

Sat 2/28

3:00 pm-7:19 pm

2 stops19h 19m

$690

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/1

6:45 am-4:40 pm

1 stop18h 55m

Osaka Kansai Intl

Wed 2/18

8:20 am-9:00 pm

2 stops27h 40m

$703

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 2/16

6:00 pm-4:40 pm

2 stops31h 40m

Osaka Kansai Intl

Fri 2/27

6:35 pm-1:14 pm

2 stops33h 39m

$706

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 2/2

11:20 am-6:10 pm

2 stops39h 50m

Osaka Itami

Thu 2/19

1:00 pm-4:44 pm

2 stops18h 44m

$707

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/1

8:05 am-6:10 pm

2 stops43h 05m

Osaka Itami

Thu 2/19

1:00 pm-9:00 pm

2 stops23h 00m

$707

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 1/31

9:57 am-6:10 pm

2 stops41h 13m

Osaka Itami

Thu 2/19

1:00 pm-9:00 pm

2 stops23h 00m

$708

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 1/22

4:35 pm-4:40 pm

2 stops33h 05m

Osaka Kansai Intl

Mon 2/2

6:35 pm-9:22 am

2 stops29h 47m

$708

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 2/5

6:00 pm-4:40 pm

2 stops31h 40m

Osaka Kansai Intl

Wed 2/18

8:20 am-10:59 pm

2 stops29h 39m

$709

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 31 results
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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
No data available for this route at this time. Please check back soon.

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 20, 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
1,009 reviews

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

Overall

8.4

Food

7.7

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
1,009 reviews
ANA
8.4
Very good
1,009 reviews

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

Overall

8.4

Food

7.7

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
1,623 reviews
ANA
8.4
Very good
1,009 reviews

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

Overall

8.4

Food

7.7

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
9,029 reviews
ANA
8.4
Very good
1,009 reviews

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

Overall

8.4

Food

7.7

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 $703, ANA can have you in Osaka from St. Louis in 18h 55m. Airlines will cover a distance of 6595 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.

  • 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

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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 Osaka Itami flights
Kansas City to Kansai Intl 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 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest$723Average$813FlexibilityNo cancel feeOn-time79%

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