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Osaka

$479+ 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
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$651
(Air Canada)

One-way from

$479
(Air Canada)

Popular in

May

Cheapest in

September

Average price

$1,160
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 July 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 July 3, 2025.

This Air Canada deal was found by Cheapflights users on 7/1. 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.
Wed 9/174:05 pmSTL - KIX
1 stop34h 20mAir Canada
Wed 9/246:05 pmKIX - STL
1 stop35h 13mAir Canada
Deal found 7/1$651
This Air Canada deal was found by Cheapflights users on 7/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/159:15 amSTL - ITM
2 stops21h 00mAir Canada
Mon 9/222:00 pmITM - STL
2 stops39h 18mAir Canada
Deal found 7/2$705
This United Airlines deal was found by Cheapflights users on 7/1. 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 9/145:49 pmSTL - KIX
1 stop31h 01mUnited Airlines
Thu 9/254:50 pmKIX - STL
1 stop37h 55mUnited Airlines
Deal found 7/1$784
This KAYAK deal was found by Cheapflights users on 7/1. 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.
Sun 9/148:20 amSTL - ITM
2 stops22h 15mANA
Thu 9/258:00 amITM - STL
2 stops20h 27mANA
Deal found 7/1$794
This Air Canada deal was found by Cheapflights users on 7/1. 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 7/79:15 amSTL - ITM
2 stops19h 55mMultiple Airlines
Mon 9/82:05 pmITM - STL
2 stops19h 52mMultiple Airlines
Deal found 7/1$845
This FlightHub deal was found by Cheapflights users on 7/1. 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 9/169:56 amSTL - ITM
2 stops19h 49mJapan Airlines
Tue 9/237:25 amITM - STL
2 stops19h 58mJapan Airlines
Deal found 7/1$847
This Japan Airlines deal was found by Cheapflights users on 7/2. 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.
Sat 9/277:23 amSTL - KIX
2 stops35h 02mJapan Airlines
Wed 10/16:45 amKIX - STL
2 stops27h 47mJapan Airlines
Deal found 7/2$892
This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/78:50 amSTL - KIX
1 stop19h 55mAmerican Airlines
Mon 9/85:55 pmKIX - STL
1 stop19h 04mAmerican Airlines
Deal found 7/2$906
This ANA deal was found by Cheapflights users on 7/1. 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 ANA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/76:00 amSTL - KIX
1 stop18h 50mMultiple Airlines
Mon 9/84:50 pmKIX - STL
1 stop38h 03mMultiple Airlines
Deal found 7/1$932
This Delta deal was found by Cheapflights users on 7/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1711:02 amSTL - KIX
2 stops39h 53mDelta
Sun 8/2412:35 pmKIX - STL
2 stops26h 03mDelta
Deal found 7/3$957
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/176:33 amSTL - ITM
2 stops44h 32mUnited Airlines
Sun 8/2412:00 pmITM - STL
2 stops25h 44mUnited Airlines
Deal found 7/3$999
This American Airlines deal was found by Cheapflights users on 7/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/178:50 amSTL - ITM
2 stops21h 00mAmerican Airlines
Sun 8/242:35 pmITM - STL
2 stops18h 34mAmerican Airlines
Deal found 7/3$1,055

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 July 3, 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

Wed 9/17

4:05 pm-4:25 pm

1 stop34h 20m

Osaka Kansai Intl

Wed 9/24

6:05 pm-3:18 pm

1 stop35h 13m

$651

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 9/15

9:15 am-8:15 pm

2 stops21h 00m

Osaka Itami

Mon 9/22

2:00 pm-3:18 pm

2 stops39h 18m

$705

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 9/14

5:49 pm-2:50 pm

1 stop31h 01m

Osaka Kansai Intl

Thu 9/25

4:50 pm-4:45 pm

1 stop37h 55m

$784

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 9/14

8:20 am-8:35 pm

2 stops22h 15m

Osaka Itami

Thu 9/25

8:00 am-2:27 pm

2 stops20h 27m

$794

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 7/7

9:15 am-7:10 pm

2 stops19h 55m

Osaka Itami

Mon 9/8

2:05 pm-7:57 pm

2 stops19h 52m

$845

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/16

9:56 am-7:45 pm

2 stops19h 49m

Osaka Itami

Tue 9/23

7:25 am-1:23 pm

2 stops19h 58m

$847

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/27

9:56 am-2:15 pm

2 stops38h 19m

Osaka Kansai Intl

Wed 10/1

6:45 am-8:32 pm

2 stops27h 47m

$892

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 7/7

8:50 am-6:45 pm

1 stop19h 55m

Osaka Kansai Intl

Mon 9/8

5:55 pm-10:59 pm

1 stop19h 04m

$906

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 7/7

6:00 am-2:50 pm

1 stop18h 50m

Osaka Kansai Intl

Mon 9/8

4:50 pm-4:53 pm

1 stop38h 03m

$932

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 8/17

11:02 am-4:55 pm

2 stops39h 53m

Osaka Kansai Intl

Sun 8/24

12:35 pm-12:38 am

2 stops26h 03m

$957

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 18 results
1
2

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 July 3, 2025.
Read through reviews of airlines operating flights from St. Louis to Osaka, such as ANA, Japan Airlines, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
893 reviews

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
ANA
8.4
Very good
893 reviews
ANA
8.4
Very good
893 reviews

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Japan Airlines
8.3
Very good
1,503 reviews
ANA
8.4
Very good
893 reviews

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Delta
8.0
Very good
7,970 reviews
ANA
8.4
Very good
893 reviews

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
United Airlines
7.4
Good
8,845 reviews
ANA
8.4
Very good
893 reviews

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
American Airlines
7.2
Good
10,000 reviews
ANA
8.4
Very good
893 reviews

Entertainment

7.9

Overall

8.4

Comfort

8.2

Crew

8.7

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.

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 ($651), United Airlines ($784), and ANA ($794) offers the cheapest pricing from St. Louis to Osaka. Users have found that Air Canada is 44% cheaper than the other options available to this destination.

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

    $479 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Japan Airlines, with prices starting from $528 and $534, 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 $884). Flying from St. Louis to Osaka in June is currently the most expensive (average of $1,319). 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?

Book flights to St. Louis if you plan to visit one of these locations
Nara
Nishinomiya

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