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Osaka

$419+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OSA
Aug 18 — Aug 251
Mon 8/18
Mon 8/25
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 August 13, 2025.

Round-trip from

$772
(United Airlines)

One-way from

$419
(Gurufare)

Popular in

May

Cheapest in

September

Average price

$1,157
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. 21% potential increase in price ($311 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($65 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 13, 2025.

This United Airlines deal was found by Cheapflights users on 8/12. 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.
Sun 11/165:29 pmSTL - ITM
2 stops33h 41mUnited Airlines
Thu 11/271:00 pmITM - STL
2 stops18h 27mUnited Airlines
Deal found 8/12$772
This Japan Airlines deal was found by Cheapflights users on 8/12. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:00 amSTL - KIX
1 stop20h 50mJapan Airlines
Wed 12/39:10 pmKIX - STL
2 stops32h 25mJapan Airlines
Deal found 8/12$776
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Sun 11/165:24 pmSTL - KIX
2 stops32h 16mUnited Airlines
Thu 11/278:25 amKIX - STL
2 stops43h 03mUnited Airlines
Deal found 8/12$779
This Japan Airlines deal was found by Cheapflights users on 8/12. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:00 amSTL - ITM
2 stops34h 40mJapan Airlines
Wed 12/312:30 pmITM - STL
2 stops41h 05mJapan Airlines
Deal found 8/12$780
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 11/124:55 pmSTL - KIX
2 stops32h 45mUnited Airlines
Thu 11/278:25 amKIX - STL
2 stops41h 26mUnited Airlines
Deal found 8/12$780
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 11/124:55 pmSTL - KIX
2 stops32h 45mUnited Airlines
Wed 12/36:35 pmKIX - STL
1 stop36h 52mUnited Airlines
Deal found 8/12$781
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Sat 11/155:29 pmSTL - ITM
2 stops33h 41mUnited Airlines
Thu 11/271:00 pmITM - STL
2 stops18h 27mUnited Airlines
Deal found 8/12$782
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Sun 11/165:24 pmSTL - KIX
2 stops32h 16mUnited Airlines
Wed 12/36:35 pmKIX - STL
2 stops41h 22mUnited Airlines
Deal found 8/12$785
This Japan Airlines deal was found by Cheapflights users on 8/12. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:00 amSTL - ITM
2 stops22h 50mJapan Airlines
Thu 11/278:30 amITM - STL
2 stops44h 56mJapan Airlines
Deal found 8/12$787
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Tue 11/1811:05 amSTL - ITM
2 stops40h 05mUnited Airlines
Thu 11/271:00 pmITM - STL
2 stops18h 27mUnited Airlines
Deal found 8/12$820
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Thu 11/1310:00 amSTL - ITM
2 stops41h 10mUnited Airlines
Wed 12/31:00 pmITM - STL
2 stops23h 40mUnited Airlines
Deal found 8/12$821
This Air Canada deal was found by Cheapflights users on 8/11. 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.
Thu 9/259:15 amSTL - KIX
1 stop17h 10mAir Canada
Thu 10/26:05 pmKIX - STL
2 stops39h 37mAir Canada
Deal found 8/11$832

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 August 13, 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

Thu 9/25

9:15 am-4:25 pm

1 stop17h 10m

Osaka Kansai Intl

Thu 10/2

6:05 pm-7:42 pm

2 stops39h 37m

$832

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/20

4:05 pm-4:25 pm

2 stops34h 20m

Osaka Kansai Intl

Sun 9/28

6:05 pm-2:27 pm

2 stops34h 22m

$836

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 9/22

7:23 am-7:45 pm

2 stops22h 22m

Osaka Itami

Wed 9/24

8:30 am-1:31 pm

2 stops19h 01m

$846

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 9/20

7:23 am-8:35 am

2 stops35h 12m

Osaka Itami

Sun 9/28

2:35 pm-10:59 pm

2 stops22h 24m

$857

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 9/25

6:00 am-9:50 pm

2 stops25h 50m

Osaka Kansai Intl

Thu 10/2

7:35 am-11:59 pm

2 stops30h 24m

$861

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 9/25

5:15 am-2:50 pm

2 stops19h 35m

Osaka Kansai Intl

Thu 10/2

4:50 pm-10:00 pm

2 stops19h 10m

$866

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/20

7:23 am-8:25 am

2 stops35h 02m

Osaka Kansai Intl

Sun 9/28

5:55 pm-10:59 pm

1 stop19h 04m

$874

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 9/22

8:50 am-10:15 pm

2 stops23h 25m

Osaka Kansai Intl

Wed 9/24

8:55 pm-11:59 pm

2 stops41h 04m

$881

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 9/20

7:23 am-12:35 pm

2 stops39h 12m

Osaka Itami

Wed 9/24

8:30 am-1:31 pm

2 stops19h 01m

$888

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/27

7:23 am-8:25 am

2 stops35h 02m

Osaka Kansai Intl

Wed 10/1

6:45 am-1:31 pm

2 stops20h 46m

$891

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 22 results
1
2
3

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 August 13, 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
930 reviews

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Boarding

8.6

Crew

8.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA
ANA
8.4
Very good
930 reviews
ANA
8.4
Very good
930 reviews

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Boarding

8.6

Crew

8.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA
Japan Airlines
8.3
Very good
1,545 reviews
ANA
8.4
Very good
930 reviews

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Boarding

8.6

Crew

8.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA
United Airlines
7.4
Good
8,920 reviews
ANA
8.4
Very good
930 reviews

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Boarding

8.6

Crew

8.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

MNL - NRT

Flight delayed from 7pm to 2am, united airlines sold our tickets so they had to book us with AA

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, United Airlines ($772), and Japan Airlines ($776) offers the cheapest pricing from St. Louis to Osaka. Users have found that United Airlines is 31% 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.

  • 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 $873). Flying from St. Louis to Osaka in June is currently the most expensive (average of $1,313). 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 Osaka?

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

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