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Osaka

$370+ 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 5 — Dec 121
Fri 12/5
Fri 12/12
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 5, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$676
(Air Canada)

One-way from

$370
(Air Canada)

Popular in

December

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. 13% potential increase in price ($191 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($74 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 5, 2025.

This United Airlines deal was found by Cheapflights users on 11/2. 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 12/86:42 pmSTL - KIX
2 stops30h 58mUnited Airlines
Fri 12/126:35 pmKIX - STL
2 stops32h 40mUnited Airlines
Deal found 11/2$793
This Air Canada deal was found by Cheapflights users on 11/5. 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 11/5$804
This United Airlines deal was found by Cheapflights users on 11/4. 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 stops33h 45mUnited Airlines
Deal found 11/4$871
This Air Canada deal was found by Cheapflights users on 11/4. 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 stops36h 20mAir Canada
Fri 12/123:45 pmKIX - STL
2 stops38h 44mAir Canada
Deal found 11/4$891
This Japan Airlines deal was found by Cheapflights users on 11/2. 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 Japan 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 55mJapan Airlines
Fri 12/123:00 pmKIX - STL
2 stops37h 29mJapan Airlines
Deal found 11/2$933
This American Airlines deal was found by Cheapflights users on 11/4. 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 11/4$957
This Japan Airlines deal was found by Cheapflights users on 11/4. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/82:17 pmSTL - ITM
2 stops38h 33mJapan Airlines
Tue 11/114:30 pmITM - STL
2 stops35h 35mJapan Airlines
Deal found 11/4$967
This Ovago deal was found by Cheapflights users on 11/3. 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.
Sun 11/97:00 amSTL - ITM
2 stops21h 50mJapan Airlines
Sun 11/164:30 pmITM - STL
2 stops36h 10mJapan Airlines
Deal found 11/3$1,174
This FlightHub deal was found by Cheapflights users on 11/4. 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 12/224:05 pmSTL - ITM
2 stops37h 15mAir Canada
Wed 12/313:00 pmITM - STL
2 stops39h 29mAir Canada
Deal found 11/4$1,834
This Ovago deal was found by Cheapflights users on 11/4. 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 12/51:59 pmSTL - ITM
2 stops26h 41mJapan Airlines
Fri 1/27:25 amITM - STL
2 stops31h 26mJapan Airlines
Deal found 11/4$2,097
This Gotogate deal was found by Cheapflights users on 11/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/209:55 amSTL - ITM
2 stops42h 00mANA
Sat 12/278:00 amITM - STL
2 stops24h 54mANA
Deal found 11/5$2,467

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 5, 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 - KIX

STLKIX

Lambert-St Louis

Tue 2/3

4:05 pm-7:25 pm

2 stops36h 20m

Osaka Kansai Intl

Thu 2/19

3:45 pm-3:29 pm

2 stops38h 44m

$687

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

2:00 pm-7:19 pm

2 stops20h 19m

$690

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

7:41 am-6:10 pm

2 stops43h 29m

Osaka Itami

Sat 2/28

1:00 pm-7:19 pm

2 stops21h 19m

$708

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

9:55 am-7:25 pm

2 stops42h 30m

Osaka Kansai Intl

Sat 2/28

8:20 am-7:19 pm

2 stops25h 59m

$711

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 2/7

4:05 pm-8:20 pm

2 stops37h 15m

Osaka Itami

Mon 2/16

4:00 pm-3:29 pm

2 stops38h 29m

$747

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 2/7

5:00 pm-4:40 pm

1 stop32h 40m

Osaka Kansai Intl

Mon 2/16

8:20 am-9:00 pm

2 stops27h 40m

$774

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 12/8

6:42 pm-4:40 pm

2 stops30h 58m

Osaka Kansai Intl

Fri 12/12

6:35 pm-12:15 pm

2 stops32h 40m

$793

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

7:41 am-10:20 pm

2 stops23h 39m

Osaka Kansai Intl

Sat 2/28

2:05 pm-7:19 pm

2 stops20h 14m

$813

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 3/9

11:25 am-8:35 pm

2 stops19h 10m

Osaka Itami

Thu 3/19

10:00 am-7:19 pm

2 stops23h 19m

$833

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 3/3

7:41 am-8:20 pm

2 stops21h 39m

Osaka Itami

Fri 3/13

2:00 pm-7:19 pm

2 stops19h 19m

$833

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 29 results
1
2
3

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 5, 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
1,003 reviews

Entertainment

7.9

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Overall

8.4

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
1,003 reviews
ANA
8.4
Very good
1,003 reviews

Entertainment

7.9

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Overall

8.4

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
1,604 reviews
ANA
8.4
Very good
1,003 reviews

Entertainment

7.9

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Overall

8.4

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
9,001 reviews
ANA
8.4
Very good
1,003 reviews

Entertainment

7.9

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Overall

8.4

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 $690, Air Canada can have you in Osaka from St. Louis in 20h 14m. 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.

  • 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 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 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest$723Average$813FlexibilityNo cancel feeOn-time79%

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