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Osaka

$438+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OSA
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$769
(Air Canada)

One-way from

$438
(United Airlines)

Popular in

May

Cheapest in

September

Average price

$1,226
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. 19% potential increase in price ($283 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($67 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 junio 12, 2025.

This Air Canada deal was found by Cheapflights users on 6/12. 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.
sáb. 9/209:15 amSTL - KIX
1 stop17h 10mAir Canada
dom. 9/286:05 pmKIX - STL
2 stops30h 44mAir Canada
Deal found 6/12$624
This United Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 10/205:47 pmSTL - KIX
1 stop31h 03mUnited Airlines
mar. 10/288:25 amKIX - STL
2 stops29h 19mUnited Airlines
Deal found 6/12$709
This Air Canada deal was found by Cheapflights users on 6/11. 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.
lun. 12/84:15 pmSTL - KIX
2 stops39h 05mMultiple Airlines
sáb. 12/203:40 pmKIX - STL
2 stops38h 46mMultiple Airlines
Deal found 6/11$756
This FlightHub deal was found by Cheapflights users on 6/10. 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.
sáb. 9/209:15 amSTL - ITM
2 stops19h 55mAir Canada
dom. 9/282:05 pmITM - STL
2 stops19h 33mAir Canada
Deal found 6/10$850
This Ovago deal was found by Cheapflights users on 6/11. 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.
vie. 11/146:15 amSTL - ITM
2 stops23h 05mANA
sáb. 11/227:05 amITM - STL
2 stops23h 45mANA
Deal found 6/11$900
This Trip.com deal was found by Cheapflights users on 6/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/1912:25 pmSTL - ITM
2 stops40h 30mMultiple Airlines
mar. 10/282:00 pmITM - STL
2 stops23h 44mMultiple Airlines
Deal found 6/12$904
This American Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 7/78:50 amSTL - KIX
1 stop19h 55mAmerican Airlines
lun. 9/85:55 pmKIX - STL
1 stop19h 04mAmerican Airlines
Deal found 6/12$953
This United Airlines deal was found by Cheapflights users on 6/10. 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.
lun. 7/76:00 amSTL - ITM
2 stops21h 05mUnited Airlines
lun. 9/812:00 pmITM - STL
2 stops40h 19mUnited Airlines
Deal found 6/10$989
This Japan Airlines deal was found by Cheapflights users on 6/10. 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.
dom. 12/286:30 pmSTL - ITM
2 stops34h 25mJapan Airlines
sáb. 1/104:55 pmITM - STL
2 stops33h 13mJapan Airlines
Deal found 6/10$1,186
This Japan Airlines deal was found by Cheapflights users on 6/10. 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.
dom. 12/286:30 pmSTL - KIX
2 stops36h 50mJapan Airlines
sáb. 1/103:05 pmKIX - STL
2 stops37h 42mJapan Airlines
Deal found 6/10$1,189
This FlightHub deal was found by Cheapflights users on 6/12. 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.
vie. 6/136:30 amSTL - KIX
2 stops23h 00mANA
lun. 6/2311:00 amKIX - STL
2 stops22h 37mANA
Deal found 6/12$1,298
This oojo deal was found by Cheapflights users on 6/11. 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.
sáb. 9/206:20 amSTL - KIX
2 stops34h 20mCathay Pacific
dom. 9/284:20 pmKIX - STL
3 stops44h 30mCathay Pacific
Deal found 6/11$1,496

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 junio 12, 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

lun. 7/7

5:00 am-4:25 pm

2 stops21h 25m

Osaka Kansai Intl

lun. 9/8

6:05 pm-7:57 pm

2 stops39h 52m

$769

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

lun. 7/7

8:50 am-6:45 pm

1 stop19h 55m

Osaka Kansai Intl

lun. 9/8

5:55 pm-10:59 pm

1 stop19h 04m

$953

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

lun. 7/7

6:00 am-5:05 pm

2 stops21h 05m

Osaka Itami

lun. 9/8

12:00 pm-2:19 pm

2 stops40h 19m

$989

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

mar. 7/29

4:45 pm-2:50 pm

2 stops32h 05m

Osaka Kansai Intl

vie. 8/8

4:55 pm-12:46 pm

2 stops33h 51m

$1,061

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

vie. 6/27

7:20 am-8:20 am

2 stops35h 00m

Osaka Kansai Intl

sáb. 7/19

6:20 pm-11:59 pm

2 stops43h 39m

$1,235

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

mar. 7/29

1:20 pm-7:25 am

2 stops28h 05m

Osaka Itami

vie. 8/8

7:30 am-2:37 pm

2 stops21h 07m

$1,267

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

lun. 7/7

8:01 pm-6:40 am

2 stops44h 39m

Osaka Kansai Intl

lun. 9/8

4:20 pm-8:34 pm

3 stops42h 14m

$1,779

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

lun. 7/7

5:23 pm-7:50 pm

3 stops36h 27m

Osaka Itami

lun. 9/8

2:35 pm-2:24 pm

3 stops37h 49m

$2,003

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

lun. 7/7

10:00 am-8:35 am

3 stops56h 35m

Osaka Itami

lun. 9/8

8:05 pm-8:23 pm

3 stops38h 18m

$8,576

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

sáb. 8/23

5:49 pm-5:05 pm

2 stops33h 16m

$438

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 21 results
1
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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

Rainfall in Osaka by month

Plan your trip to Osaka by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Osaka ranges from 1.6 - 7.9 inches per month. June is typically the wettest month, when rainfall can reach 7.9 in. January is typically the driest time to visit Osaka when rainfall is around 1.6 in.

Temperature in Osaka by month

Plan your trip to Osaka by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Osaka, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

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 junio 12, 2025.
Japan Airlines
8.3
Very good
1,490 reviews

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Japan Airlines
8.3
Very good
1,490 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
ANA
8.3
Very good
882 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Delta
8.0
Very good
7,946 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Cathay Pacific
7.6
Good
892 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Qatar Airways
7.4
Good
3,584 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.

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 0 different airlines.

  • What are the cheapest airlines flying from St. Louis to Osaka round-trip?

    According to our current data, Air Canada ($769), American Airlines ($953), and United Airlines ($989) offers the cheapest pricing from St. Louis to Osaka. Users have found that Air Canada is 34% cheaper than the other options available to this destination.

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

    $438 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and Japan Airlines, with prices starting from $438 and $452, 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.

  • What is the cheapest month to book a flight from St. Louis to Osaka?

    Currently, February is the cheapest month in which you can book a flight from St. Louis to Osaka (average of $888). Flying from St. Louis to Osaka in June is currently the most expensive (average of $1,324). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

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Nara
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