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$120+ Cheap flights from Oshkosh, WI to San Diego (SAN)

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SAN
Jan 21 — Jan 281
Wed 1/21
Wed 1/28
1 adult, Economy
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Cheapflights Tip: The best prices from Oshkosh to San Diego are usually found in September or July, booked 69 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from Oshkosh to San Diego

Cheapest flights from Oshkosh to San Diego
Explore the most affordable flight options available from Oshkosh to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 22, 2025.

This Delta deal was found by Cheapflights users on 12/21. 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.
Wed 12/245:25 amATW - SAN
1 stop8h 38mDelta
Tue 1/66:15 amSAN - ATW
1 stop7h 25mDelta
Deal found 12/21$374
This Delta deal was found by Cheapflights users on 12/21. 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.
Wed 12/245:25 amATW - SAN
1 stop8h 38mDelta
Wed 12/3110:20 pmSAN - ATW
1 stop9h 41mDelta
Deal found 12/21$419
This Delta deal was found by Cheapflights users on 12/21. 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.
Tue 12/237:00 amATW - SAN
1 stop9h 26mDelta
Tue 1/66:15 amSAN - ATW
1 stop9h 08mDelta
Deal found 12/21$432
This Delta deal was found by Cheapflights users on 12/21. 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.
Mon 12/225:25 amATW - SAN
1 stop8h 38mDelta
Tue 1/66:15 amSAN - ATW
1 stop7h 25mDelta
Deal found 12/21$439
This Delta deal was found by Cheapflights users on 12/21. 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.
Wed 12/245:25 amATW - SAN
1 stop8h 38mDelta
Mon 1/56:15 amSAN - ATW
1 stop7h 25mDelta
Deal found 12/21$444
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/258:16 amATW - SAN
2 stops13h 41mUnited Airlines
Tue 1/611:10 amSAN - ATW
1 stop7h 40mUnited Airlines
Deal found 12/21$469
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/256:15 amATW - SAN
2 stops11h 40mUnited Airlines
Mon 1/59:30 pmSAN - ATW
2 stops12h 30mUnited Airlines
Deal found 12/21$474
This Delta deal was found by Cheapflights users on 12/21. 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.
Tue 12/236:00 amATW - SAN
1 stop7h 30mDelta
Wed 12/3110:20 pmSAN - ATW
1 stop9h 41mDelta
Deal found 12/21$477
This Delta deal was found by Cheapflights users on 12/21. 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.
Mon 12/227:00 amATW - SAN
1 stop9h 26mDelta
Thu 1/11:13 pmSAN - ATW
1 stop7h 56mDelta
Deal found 12/21$484
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/241:00 pmATW - SAN
2 stops8h 57mUnited Airlines
Tue 1/611:10 amSAN - ATW
1 stop7h 40mUnited Airlines
Deal found 12/21$491
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/241:00 pmATW - SAN
2 stops8h 57mUnited Airlines
Mon 1/59:30 pmSAN - ATW
2 stops14h 39mUnited Airlines
Deal found 12/21$496
This Delta deal was found by Cheapflights users on 12/21. 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.
Tue 12/235:25 amATW - SAN
1 stop8h 38mDelta
Mon 1/56:15 amSAN - ATW
1 stop7h 25mDelta
Deal found 12/21$502

Find flight deals from Oshkosh to San Diego

Keep the following information in mind while searching for Oshkosh to San Diego flight deals. Data was last updated December 22, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$246
(Kiwi.com)

One-way from

$120
(Trip.com)

Popular in

March

Cheapest in

September

Average price

$462
Provider with most accurate pricing for Appleton Intl-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Appleton Intl-San Diego flights.
Search Deals
From Oshkosh to San Diego
Search Deals
One-way flight from Oshkosh to San Diego
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Oshkosh to San Diego 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 December 22, 2025.
Use the filters below to find and compare flights from Oshkosh to San Diego that are best for you.

Fly from

Oshkosh

Fly to

San Diego

Route

Depart

Return

Price

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Fri 2/6

6:30 am-12:29 pm

1 stop7h 59m

San Diego

Thu 2/12

3:23 pm-11:16 pm

1 stop5h 53m

$309

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Tue 1/13

4:20 pm-8:51 pm

1 stop6h 31m

San Diego

Sat 1/24

6:15 am-3:40 pm

1 stop7h 25m

$309

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Mon 1/12

5:23 pm-10:33 pm

1 stop7h 10m

San Diego

Wed 1/21

7:00 am-4:48 pm

1 stop7h 48m

$309

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Tue 2/10

5:20 am-12:55 pm

1 stop9h 35m

San Diego

Sun 2/15

6:15 am-3:40 pm

1 stop7h 25m

$309

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Sat 2/7

5:04 pm-10:26 pm

1 stop7h 22m

San Diego

Thu 2/12

3:23 pm-11:16 pm

1 stop5h 53m

$309

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Mon 1/12

2:45 pm-10:33 pm

1 stop9h 48m

San Diego

Sat 1/24

1:00 pm-8:50 pm

1 stop5h 50m

$309

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Wed 1/21

6:10 am-10:48 am

1 stop6h 38m

San Diego

Sun 1/25

6:15 am-3:40 pm

1 stop7h 25m

$309

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Sun 1/11

5:23 pm-10:33 pm

1 stop7h 10m

San Diego

Sat 1/17

11:10 am-8:50 pm

1 stop7h 40m

$309

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Thu 1/22

11:03 am-7:01 pm

1 stop9h 58m

San Diego

Tue 1/27

6:15 am-5:43 pm

1 stop9h 28m

$309

AppletonSan Diego

ATW - SAN

ATWSAN

Appleton Intl

Thu 1/22

6:15 am-11:48 am

1 stop7h 33m

San Diego

Tue 1/27

7:00 am-4:48 pm

1 stop7h 48m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Showing 1-10 of 20 results
1
2

Best time to book a flight from Oshkosh to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego 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 San Diego

How far ahead should I book a flight from Oshkosh to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from Oshkosh to San Diego. Price data was last updated on December 19, 2025.

To ensure you get the cheapest price possible for a flight from Oshkosh to San Diego, you should look to book at least 69 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Oshkosh to San Diego?

Currently, August is the cheapest month in which you can book a flight from Oshkosh to San Diego (average of $168). Flying from Oshkosh to San Diego in December is currently the most expensive (average of $256). 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 SAN?

Find hourly flight availability from Oshkosh to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 22, 2025.

It’s typically best to fly out from Oshkosh to San Diego in the evening. Doing so could potentially save you 14% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Oshkosh to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Oshkosh to San Diego. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Oshkosh to San Diego flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Oshkosh to San Diego?

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated December 22, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Oshkosh to San Diego to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,014 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,014 reviews
Delta
7.9
Good
8,014 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
9,102 reviews
Delta
7.9
Good
8,014 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
11,052 reviews
Delta
7.9
Good
8,014 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Oshkosh to San Diego. 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 into for flights to San Diego from Oshkosh?

    For a flight from Oshkosh to San Diego, you will be flying into San Diego. San Diego (SAN) is just 2.6 mi from the center of the city. San Diego is the only San Diego airport and it handles 0 inbound flights from Oshkosh per day. 7 airlines have flights to San Diego from Oshkosh on a regular basis.

  • How long is the flight from Oshkosh to San Diego?

    Departing from Oshkosh to San Diego will take you 6h 31m. The distance between Oshkosh and San Diego is about 1730 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Oshkosh to San Diego one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $114. Users have also found prices from $159 and $169 on United Airlines and Delta, respectively.

  • What are the cheapest flights from Oshkosh to San Diego?

    The cheapest flight price from Oshkosh to San Diego is $174. On average you can expect to pay $583. The most popular route, (Appleton Intl - San Diego), can usually be booked for $309.

  • Can I find deals for flights from Oshkosh to San Diego that include hotel bookings?

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

  • How can I find direct flights from Oshkosh to San Diego?

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

  • Can I find deals for business class flights from Oshkosh to San Diego?

    Yes. Cheapflights offers flight deals from Oshkosh to San Diego 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 San Diego?

    Currently, August is the cheapest month in which you can book a flight from Oshkosh to San Diego (average of $168). Flying from Oshkosh to San Diego in December is currently the most expensive (average of $256). 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 San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

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Alternative routes for Oshkosh to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Oshkosh to San Diego

Discover the top 7 airlines that operate flights from Oshkosh to San Diego. 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 December 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$121Average$263FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$173Average$262FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$216Average$443FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$235Average$417FlexibilityNo cancel feeOn-time69%
DeltaCheapest$256Average$407FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$276Average$438FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$372Average$691FlexibilityNo cancel feeOn-time75%

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