$123+ Cheap flights from O'Hare Intl (ORD) to San Diego (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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SAN
Oct 7 — Oct 141
Round-trip
1 adult, Economy
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Find cheap flights from O'Hare Intl 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Chicago O'Hare Intl to San Diego are usually found in January or February, booked 50 days in advance, depart on a Wednesday or Thursday and return on a Friday
Cheap flight deals from O'Hare Intl to San Diego
Cheapest
Best
Last-minute
One-way
Cheapest flights from O'Hare Intl to San DiegoExplore the most affordable flight options available from O'Hare Intl to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 7, 2026.
Explore the most affordable flight options available from O'Hare Intl to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:30 am -
1 stop11h 29m
Mon 10/128:34 pm -
2 stops32h 00m
Deal found 9/2![Frontier logo]()
$246
This CheapOair deal was found by Cheapflights users on 9/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/288:55 pm -
1 stop22h 04m
Sat 10/39:03 am -
1 stop12h 01m
Deal found 9/3![Frontier logo]()
$248
This SmartFares deal was found by Cheapflights users on 9/3. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:17 pm -
Nonstop4h 43m
Wed 9/307:03 am -
Nonstop4h 19m
Deal found 9/3![Alaska Airlines logo]()
$249
This Expedia deal was found by Cheapflights users on 9/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:30 pm -
1 stop27h 19m
Mon 10/266:25 am -
1 stop15h 59m
Deal found 9/2![Frontier logo]()
$250
This Trip.com deal was found by Cheapflights users on 9/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:30 am -
1 stop19h 21m
Sat 10/39:03 am -
1 stop8h 38m
Deal found 9/4![Frontier logo]()
$251
This Priceline deal was found by Cheapflights users on 9/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/142:21 pm -
Nonstop4h 40m
Mon 10/192:01 pm -
1 stop8h 58m
Deal found 9/2![Multiple Airlines logo]()
$252
This Expedia deal was found by Cheapflights users on 9/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:20 am -
Nonstop4h 40m
Wed 9/306:25 am -
1 stop15h 58m
Deal found 9/2![Multiple Airlines logo]()
$253
This CheapOair deal was found by Cheapflights users on 9/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:30 am -
1 stop19h 26m
Tue 10/276:25 am -
1 stop15h 56m
Deal found 9/2![Frontier logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:30 am -
1 stop19h 21m
Tue 9/2910:28 am -
2 stops17h 10m
Deal found 9/2![Frontier logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/194:20 pm -
1 stop24h 09m
Sat 10/243:14 pm -
2 stops16h 07m
Deal found 9/3![Frontier logo]()
$256
This Frontier deal was found by Cheapflights users on 9/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:30 am -
1 stop11h 28m
Sat 9/269:03 am -
1 stop8h 38m
Deal found 9/2![Frontier logo]()
$257
This Priceline deal was found by Cheapflights users on 9/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:20 am -
Nonstop4h 40m
Mon 9/289:03 pm -
1 stop6h 35m
Deal found 9/2![Multiple Airlines logo]()
$258
Best flights from O'Hare Intl to San DiegoDiscover carefully curated flight deals from O'Hare Intl to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 7, 2026.
Discover carefully curated flight deals from O'Hare Intl to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 7, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:20 am -
Nonstop4h 36m
Sat 10/2412:35 pm -
Nonstop4h 18m
Deal found 9/3![Alaska Airlines logo]()
$272
This United Airlines deal was found by Cheapflights users on 9/4. 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 10/77:05 am -
Nonstop4h 27m
Wed 10/214:55 pm -
Nonstop4h 04m
Deal found 9/4![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 9/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:40 am -
1 stop10h 10m
Wed 11/181:49 pm -
1 stop8h 10m
Deal found 9/6![Delta logo]()
$283
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/288:17 pm -
Nonstop4h 43m
Thu 10/15:45 pm -
Nonstop4h 14m
Deal found 9/6![Alaska Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 9/3. 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 10/148:16 pm -
Nonstop4h 25m
Mon 10/194:55 pm -
Nonstop4h 04m
Deal found 9/3![United Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 9/3. 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 10/148:16 pm -
Nonstop4h 25m
Mon 10/2610:30 pm -
Nonstop4h 04m
Deal found 9/3![United Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:00 am -
1 stop18h 26m
Sat 10/247:00 am -
Nonstop4h 25m
Deal found 9/6![Alaska Airlines logo]()
$280
This United Airlines deal was found by Cheapflights users on 9/2. 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 10/228:16 pm -
Nonstop4h 25m
Mon 10/266:50 am -
Nonstop4h 19m
Deal found 9/2![United Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:46 pm -
1 stop18h 20m
Tue 10/209:20 am -
1 stop18h 20m
Deal found 9/6![Alaska Airlines logo]()
$283
This United Airlines deal was found by Cheapflights users on 9/4. 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.
Sat 10/108:16 pm -
Nonstop4h 25m
Mon 10/1210:30 pm -
Nonstop4h 03m
Deal found 9/4![United Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 9/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:20 am -
Nonstop4h 36m
Sun 10/117:00 am -
Nonstop4h 25m
Deal found 9/2![Alaska Airlines logo]()
$307
Last-minute flights from O'Hare Intl to San DiegoDiscover last-minute flight deals from O'Hare Intl to San Diego. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to San Diego. Data last updated September 7, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 9/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:30 am -
1 stop11h 28m
Sat 9/269:03 am -
1 stop8h 38m
Deal found 9/2![Frontier logo]()
$257
This SmartFares deal was found by Cheapflights users on 9/3. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:17 pm -
Nonstop4h 43m
Wed 9/307:03 am -
Nonstop4h 19m
Deal found 9/3![Alaska Airlines logo]()
$249
This Priceline deal was found by Cheapflights users on 9/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:20 am -
Nonstop4h 40m
Mon 9/289:03 pm -
1 stop6h 35m
Deal found 9/2![Multiple Airlines logo]()
$258
This Trip.com deal was found by Cheapflights users on 9/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:30 am -
1 stop19h 21m
Sat 10/39:03 am -
1 stop8h 38m
Deal found 9/4![Frontier logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:30 am -
1 stop19h 21m
Tue 9/2910:28 am -
2 stops17h 10m
Deal found 9/2![Frontier logo]()
$255
This CheapOair deal was found by Cheapflights users on 9/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/288:55 pm -
1 stop22h 04m
Thu 10/19:03 pm -
1 stop6h 35m
Deal found 9/2![Frontier logo]()
$248
This Expedia deal was found by Cheapflights users on 9/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:20 am -
Nonstop4h 40m
Wed 9/306:25 am -
1 stop15h 58m
Deal found 9/2![Multiple Airlines logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:30 am -
1 stop11h 29m
Mon 10/128:34 pm -
2 stops32h 00m
Deal found 9/2![Frontier logo]()
$246
This Priceline deal was found by Cheapflights users on 9/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/142:21 pm -
Nonstop4h 40m
Mon 10/192:01 pm -
1 stop8h 58m
Deal found 9/2![Multiple Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/194:20 pm -
1 stop24h 09m
Sat 10/243:14 pm -
2 stops16h 07m
Deal found 9/3![Frontier logo]()
$256
This Expedia deal was found by Cheapflights users on 9/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:30 pm -
1 stop27h 19m
Mon 10/266:25 am -
1 stop15h 59m
Deal found 9/2![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 9/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:30 am -
1 stop19h 26m
Tue 10/276:25 am -
1 stop15h 56m
Deal found 9/2![Frontier logo]()
$254
One-way flights from O'Hare Intl to San DiegoSearch for one-way flight options from O'Hare Intl to San Diego. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
Search for one-way flight options from O'Hare Intl to San Diego. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
This Super.com deal was found by Cheapflights users on 9/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:30 am -
1 stop19h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$123
This Super.com deal was found by Cheapflights users on 9/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:30 am -
1 stop11h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$124
This Frontier deal was found by Cheapflights users on 9/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:30 am -
1 stop11h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$125
This SmartFares deal was found by Cheapflights users on 9/2. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/167:57 pm -
Nonstop4h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Alaska Airlines logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/88:01 pm -
2 stops46h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$129
This eDestinos deal was found by Cheapflights users on 9/6. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:30 am -
1 stop19h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$130
This Frontier deal was found by Cheapflights users on 9/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/241:01 pm -
1 stop6h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:01 pm -
2 stops44h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$132
This Super.com deal was found by Cheapflights users on 9/3. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:55 pm -
1 stop22h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$135
Find flight deals from O'Hare Intl to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) 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 September 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $248 (CheapOair) |
One-way from | $123 (Super.com) |
Popular in | July |
Cheapest in | January |
Average price | $345 |
Good round-trip deal | $285 or less |
Good one-way deal | $173 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from O'Hare Intl 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 September 7, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Sat 9/26
8:16 pm-10:41 pm
Nonstop4h 25m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$139
Quickest round-trip
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Tue 3/2
7:55 pm-10:15 pm
Nonstop4h 20m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$139
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Thu 10/8
2:21 pm-5:01 pm
Nonstop4h 40m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$139
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Sat 10/10
8:16 pm-10:41 pm
Nonstop4h 25m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$139
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Sat 12/5
9:20 am-11:45 am
Nonstop4h 25m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$139
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Thu 12/3
9:20 am-11:45 am
Nonstop4h 25m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$139
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Sat 2/27
11:30 am-6:27 pm
1 stop8h 57m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Tue 3/2
2:10 pm-7:49 pm
1 stop7h 39m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Fri 9/25
8:16 pm-10:41 pm
Nonstop4h 25m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$151
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Fri 12/4
2:54 pm-5:19 pm
Nonstop4h 25m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$151
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from O'Hare Intl 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 O'Hare Intl to San Diego in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-San Diego flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-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 Chicago O'Hare Intl Airport-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 O'Hare Intl to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from O'Hare Intl with our price prediction graph.
ORD-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.
Cheapflights Insights
Everything you need to know about your flight from Chicago O'Hare Intl Airport to San Diego
Prices
Airlines
How far ahead should I book a flight from Chicago O'Hare Intl Airport to San Diego?
The price you pay for your flight from Chicago O'Hare Intl Airport to San Diego may vary depending on when you book. For the best chance of a lower fare, look to book 49 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to San Diego?
Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to San Diego (average of $251). Flying from Chicago O'Hare Intl Airport to San Diego in July is currently the most expensive (average of $369). 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 ORD to SAN?
Find hourly flight availability from O'Hare Intl 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 September 7, 2026.
It’s optimal to fly from Chicago O'Hare Intl Airport to San Diego in the evening. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight at noon.
What is the cheapest day to fly from Chicago O'Hare Intl Airport to San Diego?
Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to San Diego. Price data was last updated on August 29, 2026.
Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to San Diego flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for Chicago O'Hare Intl Airport to San Diego flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to San Diego trip
Our travel experts
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 September 7, 2026.
See what other customers who have flown with Alaska Airlines,Hawaiian Airlines, andUnited Airlines from Chicago O'Hare Intl Airport to San Diego have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Related info for your journey
Find useful and relevant information for your journey from O'Hare Intl 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
Coronado
Poway
San Ysidro
La Mesa
Santee
Julian
Lemon Grove
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O'Hare Intl and San Diego flights
Browse other O'Hare Intl and San Diego flight options. Last updated on September 7, 2026.
Other flights from O'Hare Intl
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Top 6 airlines flying from O'Hare Intl to San Diego
Discover the top 6 airlines that operate flights from O'Hare Intl 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 September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$126 | Average$273 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$153 | Average$230 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$156 | Average$309 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$160 | Average$339 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$167 | Average$328 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$186 | Average$296 | FlexibilityNo cancel fee | On-timeN/A |