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$329+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — SAN
Feb 6 — Feb 131
Fri 2/6
Fri 2/13
1 adult, Economy
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Cheap 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 January 7, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$329
(American Airlines)

Popular in

February

Cheapest in

August

Average price

$344
Provider with most accurate pricing for Waterloo-San Diego flight deals.
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Provider most trusted by Cheapflights users for Waterloo-San Diego flights.
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From Waterloo to San Diego
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($61 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 January 7, 2026.

This American Airlines deal was found by Cheapflights users on 1/6. 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.
Tue 2/36:00 amALO - SAN
1 stop9h 08mAmerican Airlines
Tue 2/101:58 pmSAN - ALO
1 stop6h 25mAmerican Airlines
Deal found 1/6$329
This American Airlines deal was found by Cheapflights users on 1/6. 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.
Thu 1/223:23 pmALO - SAN
1 stop9h 03mAmerican Airlines
Wed 1/281:58 pmSAN - ALO
1 stop6h 25mAmerican Airlines
Deal found 1/6$364
This American Airlines deal was found by Cheapflights users on 1/6. 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.
Tue 1/206:00 amALO - SAN
1 stop9h 08mAmerican Airlines
Fri 1/231:58 pmSAN - ALO
1 stop6h 25mAmerican Airlines
Deal found 1/6$379
This American Airlines deal was found by Cheapflights users on 1/6. 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.
Wed 1/216:00 amALO - SAN
1 stop9h 08mAmerican Airlines
Sun 1/251:58 pmSAN - ALO
1 stop6h 25mAmerican Airlines
Deal found 1/6$399

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 January 7, 2026.
Use the filters below to find and compare flights from Waterloo to San Diego that are best for you.

Fly from

Waterloo

Fly to

San Diego

Route

Depart

Return

Price

WaterlooSan Diego

ALO - SAN

ALOSAN

Waterloo

Tue 2/3

6:00 am-1:08 pm

1 stop9h 08m

San Diego

Tue 2/10

1:58 pm-10:23 pm

1 stop6h 25m

$329

WaterlooSan Diego

ALO - SAN

ALOSAN

Waterloo

Thu 1/22

3:23 pm-10:26 pm

1 stop9h 03m

San Diego

Wed 1/28

1:58 pm-10:23 pm

1 stop6h 25m

$364

WaterlooSan Diego

ALO - SAN

ALOSAN

Waterloo

Tue 1/20

6:00 am-1:08 pm

1 stop9h 08m

San Diego

Fri 1/23

1:58 pm-10:23 pm

1 stop6h 25m

$379

WaterlooSan Diego

ALO - SAN

ALOSAN

Waterloo

Wed 1/21

6:00 am-2:14 pm

2 stops10h 14m

San Diego

Sun 1/25

6:20 am-10:23 pm

2 stops14h 03m

$495

WaterlooSan Diego

ALO - SAN

ALOSAN

Waterloo

Fri 3/13

3:10 pm-9:43 pm

1 stop8h 33m

$521

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Waterloo, Iowa-San Diego flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, August is the cheapest month in which you can book a flight from Waterloo, Iowa to San Diego (average of $100). Flying from Waterloo, Iowa to San Diego in November is currently the most expensive (average of $143). 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 January 7, 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
7.2
Good
11,088 reviews

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.2

Boarding

7.5

Food

6.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.
American Airlines
7.2
Good
11,088 reviews
American Airlines
7.2
Good
11,088 reviews

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.2

Boarding

7.5

Food

6.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.

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 9h 08m. 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 25% 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, August is the cheapest month in which you can book a flight from Waterloo, Iowa to San Diego (average of $100). Flying from Waterloo, Iowa to San Diego in November is currently the most expensive (average of $143). 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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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 January 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$388FlexibilityNo cancel feeOn-time71%

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