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$635+ Cheap flights from Waterloo, IA to San Diego (ALO - SAN)

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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — SAN
May 13 — May 201
Wed 5/13
Wed 5/20
1 adult, Economy
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Cheap flight deals from Waterloo to San Diego

Cheapest flights from Waterloo to San Diego
Explore the most affordable flight options available from Waterloo to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 13, 2026.

This American Airlines deal was found by Cheapflights users on 4/9. 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.
Fri 4/242:23 pm
ALO
-
SAN
1 stop8h 20m
American Airlines
Tue 4/2811:01 am
SAN
-
ALO
2 stops10h 48m
American Airlines
Deal found 4/9$635
This American Airlines deal was found by Cheapflights users on 4/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/185:40 am
ALO
-
SAN
1 stop17h 03m
American Airlines
Thu 5/2110:45 pm
SAN
-
ALO
1 stop13h 47m
American Airlines
Deal found 4/11$709

Find flight deals from Waterloo to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Waterloo (ALO) to San Diego (SAN). 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 April 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$635
(American Airlines)

Popular in

May

Cheapest in

August
Provider with most accurate pricing for Waterloo-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Waterloo-San Diego flights.
Search Deals
From Waterloo to San Diego
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Waterloo 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 April 13, 2026.
Use the filters below to find and compare flights from Waterloo to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

WaterlooSan Diego

ALO - SAN

ALOSAN

Waterloo

Fri 4/24

2:23 pm-8:43 pm

1 stop8h 20m

San Diego

Tue 4/28

11:01 am-11:49 pm

2 stops10h 48m

$635

WaterlooSan Diego

ALO - SAN

ALOSAN

Waterloo

Mon 5/18

5:40 am-8:43 pm

1 stop17h 03m

San Diego

Thu 5/21

10:45 pm-2:32 pm

1 stop13h 47m

$709

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Sorted by cheapest first

Compare providers for flights from Waterloo to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Waterloo to San Diego in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Waterloo, Iowa-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Waterloo, Iowa-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Waterloo, Iowa-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Waterloo, Iowa-San Diego flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Waterloo, Iowa-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Waterloo to San Diego

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

What is the cheapest month to book a flight from Waterloo, Iowa to San Diego?

Currently, May is the cheapest month in which you can book a flight from Waterloo, Iowa to San Diego (average of $95). Flying from Waterloo, Iowa to San Diego in March is currently the most expensive (average of $153). 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.

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 April 13, 2026.
Get a feel of what it's like to fly with American Airlines from Waterloo to San Diego by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,572 reviews

Comfort

7.2

Boarding

7.5

Crew

7.9

Overall

7.1

Food

6.4

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
American Airlines
7.1
Good
11,572 reviews
American Airlines
7.1
Good
11,572 reviews

Comfort

7.2

Boarding

7.5

Crew

7.9

Overall

7.1

Food

6.4

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

Related info for your journey

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

  • How long is the flight from Waterloo, Iowa to San Diego?

    American Airlines can get you from Waterloo, Iowa to San Diego in just under 8h 20m. Your travel time can differ by up to . Waterloo, Iowa and San Diego are separated by a distance of 1508 mi.

  • What is the cheapest airline to fly from Waterloo, Iowa to San Diego round-trip?

    According to our current data, American Airlines ($288), offers the cheapest pricing from Waterloo, Iowa to San Diego. This flight start at 28% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Waterloo 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 Waterloo, Iowa to San Diego?

    Currently, May is the cheapest month in which you can book a flight from Waterloo, Iowa to San Diego (average of $95). Flying from Waterloo, Iowa to San Diego in March is currently the most expensive (average of $153). 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
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Julian
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Top airline flying from Waterloo to San Diego

Discover the top airline that operate flights from Waterloo 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 April 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$388FlexibilityNo cancel feeOn-time71%

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