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$444+ Cheap flights from Oshkosh, WI to Costa Rica

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/15. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SJO
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Oshkosh to Costa Rica

Keep the following information in mind while searching for Oshkosh to Costa Rica flight deals. Data was last updated May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$444
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$623
Provider with most accurate pricing for Appleton Intl-San José Juan Santamaria Intl flight deals.
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Provider most trusted by Cheapflights users for Appleton Intl-San José Juan Santamaria Intl flights.
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From Oshkosh to Costa Rica
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Highest demand for flights based on searches. 9% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Oshkosh to Costa Rica

Cheapest flights from Oshkosh to Costa Rica
Explore the most affordable flight options available from Oshkosh to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This United Airlines deal was found by Cheapflights users on 4/30. 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 6/155:23 pmATW - LIR
2 stops17h 37mUnited Airlines
Sun 6/293:25 pmLIR - ATW
2 stops19h 53mUnited Airlines
Deal found 4/30$444
This American Airlines deal was found by Cheapflights users on 4/30. 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 6/156:15 pmATW - LIR
2 stops18h 30mAmerican Airlines
Sun 6/2912:45 pmLIR - ATW
2 stops19h 35mAmerican Airlines
Deal found 4/30$493
This Delta deal was found by Cheapflights users on 4/30. 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 10/125:29 amATW - SJO
1 stop7h 19mDelta
Thu 10/231:13 pmSJO - ATW
1 stop7h 46mDelta
Deal found 4/30$516
This American Airlines deal was found by Cheapflights users on 4/29. 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 11/34:50 pmATW - SJO
2 stops21h 10mAmerican Airlines
Tue 11/114:55 pmSJO - ATW
2 stops22h 55mAmerican Airlines
Deal found 4/29$541
This United Airlines deal was found by Cheapflights users on 4/30. 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 10/132:41 pmATW - SJO
2 stops22h 45mUnited Airlines
Thu 10/231:30 pmSJO - ATW
2 stops28h 56mUnited Airlines
Deal found 4/30$592
This United deal was found by Cheapflights users on 4/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/38:30 amATW - SJO
1 stop13h 45mMultiple Airlines
Sun 5/41:40 amSJO - ATW
2 stops16h 28mMultiple Airlines
Deal found 4/29$987

Cheapflights Fare Finder

Customize your flight search to find flights from Oshkosh to Costa Rica 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 May 1, 2025.
Use the filters below to find and compare flights from Oshkosh to Costa Rica that are best for you.

Fly from

Oshkosh

Fly to

Costa Rica

Route

Depart

Return

Price

AppletonLiberia

ATW - LIR

ATWLIR

Appleton Intl

Sun 6/15

5:23 pm-10:00 am

2 stops17h 37m

Liberia

Sun 6/29

3:25 pm-12:18 pm

2 stops19h 53m

$444

AppletonLiberia

ATW - LIR

ATWLIR

Appleton Intl

Sun 6/15

6:15 pm-11:45 am

2 stops18h 30m

Liberia

Sun 6/29

12:45 pm-9:20 am

2 stops19h 35m

$493

AppletonSan José

ATW - SJO

ATWSJO

Appleton Intl

Sun 10/12

5:29 am-11:48 am

1 stop7h 19m

San José Juan Santamaria Intl

Thu 10/23

1:13 pm-9:59 pm

1 stop7h 46m

$516

AppletonSan José

ATW - SJO

ATWSJO

Appleton Intl

Tue 5/20

4:37 pm-12:50 pm

2 stops21h 13m

San José Juan Santamaria Intl

Mon 5/26

11:59 pm-11:34 pm

2 stops22h 35m

$582

AppletonSan José

ATW - SJO

ATWSJO

Appleton Intl

Mon 10/13

2:41 pm-12:26 pm

2 stops22h 45m

San José Juan Santamaria Intl

Thu 10/23

1:30 pm-7:26 pm

2 stops28h 56m

$592

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Best time to book a flight from Oshkosh to Costa Rica

Have a flexible travel schedule? Discover the best time to fly to Costa Rica from Oshkosh 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 Oshkosh to Costa Rica

What is the cheapest month to book a flight from Oshkosh to Costa Rica?

Currently, September is the cheapest month in which you can book a flight from Oshkosh to Costa Rica (average of $398). Flying from Oshkosh to Costa Rica in March is currently the most expensive (average of $555). 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.

What is the cheapest time of day to fly from OS9 to CR?

Find hourly flight availability from Oshkosh to Costa Rica. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

When flying from Oshkosh to Costa Rica, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Costa Rica by month

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

In terms of precipitation, rainfall in Costa Rica ranges from 0.0 - 11.8 inches per month. September is typically the wettest month, when rainfall can reach 11.8 in. February is typically the driest time to visit Costa Rica when rainfall is around 0.0 in.

Temperature in Costa Rica by month

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

If weather is an important factor for your trip to Costa Rica, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

Reviews of airlines servicing Costa Rica

Get insights into the airlines that provide service to Costa Rica. 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 Costa Rica. Reviews last updated May 1, 2025.
To help decide which airline to fly from Oshkosh to Costa Rica, see what other customers have to say about Delta, United Airlines and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Oshkosh to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Oshkosh to Costa Rica that include hotel bookings?

    Yes. In addition to deals on Oshkosh to Costa Rica flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Oshkosh to Costa Rica?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Oshkosh to Costa Rica.

  • Can I find deals for business class flights from Oshkosh to Costa Rica?

    Yes. Cheapflights offers flight deals from Oshkosh to Costa Rica 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 Oshkosh to Costa Rica?

    Currently, September is the cheapest month in which you can book a flight from Oshkosh to Costa Rica (average of $398). Flying from Oshkosh to Costa Rica in March is currently the most expensive (average of $555). 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

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Alternative routes for Oshkosh to Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Oshkosh to Costa Rica

Discover the top 5 airlines that operate flights from Oshkosh to Costa Rica. 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$292Average$407FlexibilityNo cancel feeOn-time65%
DeltaCheapest$366Average$829FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$388Average$663FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$431Average$654FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$463Average$681FlexibilityNo cancel feeOn-time63%

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