$456+ 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 12/27. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — SAN
Nov 29 — Dec 61
Round-trip
1 adult, Economy
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Find cheap flights from Waterloo to San Diego with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Waterloo to San Diego
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Best
Last-minute
One-way
Cheapest flights from Waterloo to San DiegoExplore 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 October 30, 2026.
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 October 30, 2026.
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 12/184:19 pm -
1 stop9h 17m
Sun 12/272:04 pm -
1 stop7h 55m
Deal found 10/30![American Airlines logo]()
$578
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/276:07 am -
1 stop8h 27m
Mon 11/2310:45 pm -
1 stop22h 56m
Deal found 10/27![American Airlines logo]()
$616
This American Airlines deal was found by Cheapflights users on 10/26. 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 12/73:44 pm -
1 stop21h 00m
Fri 12/1111:34 am -
1 stop10h 40m
Deal found 10/26![American Airlines logo]()
$638
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/276:07 am -
1 stop8h 27m
Wed 11/111:29 pm -
1 stop8h 09m
Deal found 10/27![American Airlines logo]()
$642
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/293:39 pm -
1 stop8h 02m
Mon 11/2310:45 pm -
1 stop22h 56m
Deal found 10/27![American Airlines logo]()
$644
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/276:07 am -
1 stop8h 27m
Tue 11/2410:45 pm -
1 stop22h 56m
Deal found 10/27![American Airlines logo]()
$665
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/276:07 am -
1 stop8h 27m
Fri 11/276:42 am -
1 stop14h 59m
Deal found 10/27![American Airlines logo]()
$666
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/276:07 am -
1 stop8h 27m
Sun 11/151:29 pm -
1 stop8h 09m
Deal found 10/27![American Airlines logo]()
$670
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/293:39 pm -
1 stop8h 02m
Tue 11/2410:45 pm -
1 stop22h 56m
Deal found 10/27![American Airlines logo]()
$693
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/293:39 pm -
1 stop8h 02m
Fri 11/276:42 am -
1 stop14h 59m
Deal found 10/27![American Airlines logo]()
$694
Best flights from Waterloo to San DiegoDiscover carefully curated flight deals from Waterloo to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
Discover carefully curated flight deals from Waterloo to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 12/184:19 pm -
1 stop9h 17m
Sun 12/272:04 pm -
1 stop7h 55m
Deal found 10/30![American Airlines logo]()
$578
This American Airlines deal was found by Cheapflights users on 10/26. 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 12/73:44 pm -
1 stop21h 00m
Fri 12/1111:34 am -
1 stop10h 40m
Deal found 10/26![American Airlines logo]()
$638
This American Airlines deal was found by Cheapflights users on 10/26. 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 11/93:43 pm -
1 stop21h 13m
Fri 11/137:41 am -
1 stop13h 57m
Deal found 10/26![American Airlines logo]()
$798
Last-minute flights from Waterloo to San DiegoDiscover last-minute flight deals from Waterloo to San Diego. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Waterloo to San Diego. Data last updated October 30, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/293:39 pm -
1 stop8h 02m
Mon 11/2310:45 pm -
1 stop22h 56m
Deal found 10/27![American Airlines logo]()
$644
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/293:39 pm -
1 stop8h 02m
Tue 11/2410:45 pm -
1 stop22h 56m
Deal found 10/27![American Airlines logo]()
$693
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/293:39 pm -
1 stop8h 02m
Fri 11/276:42 am -
1 stop14h 59m
Deal found 10/27![American Airlines logo]()
$694
This American Airlines deal was found by Cheapflights users on 10/27. 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 10/296:07 am -
1 stop8h 27m
Thu 11/121:29 pm -
1 stop8h 09m
Deal found 10/27![American Airlines logo]()
$698
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Sat 10/316:07 am -
1 stop8h 27m
Mon 11/2310:45 pm -
1 stop22h 56m
Deal found 10/27![American Airlines logo]()
$616
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Sat 10/316:07 am -
1 stop8h 27m
Sat 11/141:29 pm -
1 stop8h 09m
Deal found 10/27![American Airlines logo]()
$642
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Sat 10/316:07 am -
1 stop8h 27m
Tue 11/241:36 pm -
1 stop23h 38m
Deal found 10/27![American Airlines logo]()
$665
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Sat 10/316:07 am -
1 stop8h 27m
Fri 11/276:42 am -
1 stop14h 59m
Deal found 10/27![American Airlines logo]()
$666
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Sat 10/316:07 am -
1 stop8h 27m
Sun 11/151:29 pm -
1 stop8h 09m
Deal found 10/27![American Airlines logo]()
$670
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Sat 10/316:07 am -
1 stop8h 27m
Wed 11/251:36 pm -
1 stop23h 38m
Deal found 10/27![American Airlines logo]()
$721
One-way flights from Waterloo to San DiegoSearch for one-way flight options from Waterloo to San Diego. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
Search for one-way flight options from Waterloo to San Diego. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This American Airlines deal was found by Cheapflights users on 10/28. 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 12/274:19 pm -
1 stop9h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![American Airlines logo]()
$456
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Sat 12/265:34 am -
2 stops20h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![American Airlines logo]()
$602
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 October 30, 2026.
Most accurate provider | Expedia 1 star |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $578 (American Airlines) |
One-way from | $456 (American Airlines) |
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 7,457,451 searches. Data last updated October 30, 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
Cheapest round-trip
Quickest round-trip
WaterlooSan Diego
ALO Waterloo - SAN San Diego
ALOSAN
Waterloo
Sun 12/27
4:19 pm-11:36 pm
1 stop9h 17m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$456
WaterlooSan Diego
ALO Waterloo - SAN San Diego
ALOSAN
Waterloo
Fri 12/18
4:19 pm-11:36 pm
1 stop9h 17m
San Diego
Sun 12/27
2:04 pm-11:59 pm
1 stop7h 55m
$578
WaterlooSan Diego
ALO Waterloo - SAN San Diego
ALOSAN
Waterloo
Sat 12/26
5:34 am-11:45 pm
2 stops20h 11m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$602
WaterlooSan Diego
ALO Waterloo - SAN San Diego
ALOSAN
Waterloo
Mon 12/7
3:44 pm-10:44 am
1 stop21h 00m
San Diego
Fri 12/11
11:34 am-12:14 am
1 stop10h 40m
$638
WaterlooSan Diego
ALO Waterloo - SAN San Diego
ALOSAN
Waterloo
Mon 11/9
3:43 pm-10:56 am
1 stop21h 13m
San Diego
Fri 11/13
7:41 am-11:38 pm
1 stop13h 57m
$798
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Waterloo, Iowa-San Diego flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Waterloo, Iowa-San Diego flight deals on Cheapflights vs. Expedia <90% 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 Expedia the most. Expedia 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.
ALO-SAN
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.
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 October 30, 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.
Boarding
7.4
Crew
7.9
Comfort
7.2
Food
6.4
Entertainment
6.8
Overall
7.0
Reviews
1 / 20
2.0
MediocreAnonymous,Mar 2026
MIA - SFO
Boarding
7.4
Crew
7.9
Comfort
7.2
Food
6.4
Entertainment
6.8
Overall
7.0
Reviews
1 / 20
2.0
MediocreAnonymous,Mar 2026
MIA - SFO
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.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
National City
Chula Vista
San Ysidro
Poway
Coronado
La Mesa
Julian
Santee
Lemon Grove
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Waterloo and San Diego flights
Browse other Waterloo and San Diego flight options. Last updated on October 30, 2026.
Other flights from Waterloo
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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 7,457,451 searches. Data last updated October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$344 | Average$497 | FlexibilityNo cancel fee | On-time71% |