$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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SAN
Oct 27 — Nov 31
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 February or January, 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
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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 27, 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 27, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/223:30 pm -
1 stop6h 19m
Tue 10/276:25 am -
1 stop15h 56m
Deal found 9/24![Frontier logo]()
$253
This Kissandfly.com deal was found by Cheapflights users on 9/26. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/172:21 pm -
Nonstop4h 40m
Sat 10/246:15 am -
1 stop8h 11m
Deal found 9/26![Alaska Airlines logo]()
$254
This CheapOair deal was found by Cheapflights users on 9/22. 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.
Tue 10/206:30 am -
1 stop19h 26m
Tue 10/276:25 am -
1 stop15h 56m
Deal found 9/22![Frontier logo]()
$255
This Cheapflightsfares deal was found by Cheapflights users on 9/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/77:25 am -
1 stop28h 54m
Thu 12/1011:14 am -
1 stop11h 40m
Deal found 9/24![Frontier logo]()
$256
This United Airlines deal was found by Cheapflights users on 9/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:30 pm -
Nonstop4h 19m
Tue 10/276:50 am -
Nonstop4h 19m
Deal found 9/26![United Airlines logo]()
$257
This Priceline deal was found by Cheapflights users on 9/22. 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.
Mon 10/263:30 pm -
1 stop6h 19m
Tue 11/37:02 am -
Nonstop4h 15m
Deal found 9/22![Multiple Airlines logo]()
$258
This Expedia deal was found by Cheapflights users on 9/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am -
1 stop19h 27m
Tue 11/312:41 pm -
Nonstop4h 18m
Deal found 9/27![Multiple Airlines logo]()
$259
This Cheapflightsfares deal was found by Cheapflights users on 9/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:30 am -
1 stop19h 27m
Tue 11/106:25 am -
1 stop15h 56m
Deal found 9/27![Frontier logo]()
$260
This Cheapflightsfares deal was found by Cheapflights users on 9/24. 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 Cheapflightsfares 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 11/36:25 am -
1 stop15h 56m
Deal found 9/24![Frontier logo]()
$262
This United Airlines deal was found by Cheapflights users on 9/25. 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 10/178:16 pm -
Nonstop4h 25m
Sat 10/247:41 pm -
1 stop7h 20m
Deal found 9/25![United Airlines logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 9/25. 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 10/264:20 pm -
1 stop19h 51m
Tue 10/274:53 pm -
1 stop29h 28m
Deal found 9/25![Frontier logo]()
$264
This CheapOair deal was found by Cheapflights users on 9/22. 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.
Tue 10/206:30 am -
1 stop11h 28m
Fri 10/232:01 pm -
1 stop8h 58m
Deal found 9/22![Frontier logo]()
$265
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 27, 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 27, 2026.
This United Airlines deal was found by Cheapflights users on 9/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:02 pm -
Nonstop4h 38m
Tue 11/34:35 pm -
Nonstop4h 12m
Deal found 9/26![United Airlines logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 9/22. 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.
Thu 10/157:49 pm -
Nonstop4h 38m
Wed 10/2112:35 pm -
Nonstop4h 18m
Deal found 9/22![Alaska Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 9/24. 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 9/24![United Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 9/23. 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 10/241:30 pm -
Nonstop4h 19m
Tue 10/276:50 am -
Nonstop4h 19m
Deal found 9/23![United Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 9/25. 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.
Thu 11/127:57 pm -
Nonstop4h 46m
Sun 11/157:02 am -
Nonstop4h 15m
Deal found 9/25![Alaska Airlines logo]()
$337
This United Airlines deal was found by Cheapflights users on 9/24. 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.
Fri 11/1312:40 pm -
Nonstop4h 32m
Mon 11/1610:30 pm -
Nonstop4h 04m
Deal found 9/24![United Airlines logo]()
$287
This Alaska Airlines deal was found by Cheapflights users on 9/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:20 am -
Nonstop4h 36m
Mon 11/27:02 am -
Nonstop4h 15m
Deal found 9/27![Alaska Airlines logo]()
$347
This United Airlines deal was found by Cheapflights users on 9/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:05 am -
Nonstop4h 27m
Thu 10/294:35 pm -
Nonstop4h 12m
Deal found 9/27![United Airlines logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 9/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/192:21 pm -
Nonstop4h 40m
Fri 10/235:46 pm -
Nonstop4h 13m
Deal found 9/27![Alaska Airlines logo]()
$357
This United Airlines deal was found by Cheapflights users on 9/23. 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 10/227:05 am -
Nonstop4h 27m
Sun 10/2510:30 pm -
Nonstop4h 04m
Deal found 9/23![United Airlines logo]()
$307
This United Airlines deal was found by Cheapflights users on 9/25. 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.
Fri 10/168:16 pm -
Nonstop4h 25m
Tue 10/204:55 pm -
Nonstop4h 04m
Deal found 9/25![United 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 27, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to San Diego. Data last updated September 27, 2026 and is based on user searches.
This Kissandfly.com deal was found by Cheapflights users on 9/26. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/172:21 pm -
Nonstop4h 40m
Sat 10/246:15 am -
1 stop8h 11m
Deal found 9/26![Alaska Airlines logo]()
$254
This United Airlines deal was found by Cheapflights users on 9/25. 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 10/178:16 pm -
Nonstop4h 25m
Sat 10/247:41 pm -
1 stop7h 20m
Deal found 9/25![United Airlines logo]()
$263
This CheapOair deal was found by Cheapflights users on 9/22. 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.
Tue 10/206:30 am -
1 stop19h 26m
Tue 10/276:25 am -
1 stop15h 56m
Deal found 9/22![Frontier logo]()
$255
This CheapOair deal was found by Cheapflights users on 9/22. 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.
Tue 10/206:30 am -
1 stop11h 28m
Fri 10/232:01 pm -
1 stop8h 58m
Deal found 9/22![Frontier logo]()
$265
This Cheapflightsfares deal was found by Cheapflights users on 9/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/223:30 pm -
1 stop6h 19m
Mon 10/266:25 am -
1 stop15h 59m
Deal found 9/24![Frontier logo]()
$253
This United Airlines deal was found by Cheapflights users on 9/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:30 pm -
Nonstop4h 19m
Tue 10/276:50 am -
Nonstop4h 19m
Deal found 9/26![United Airlines logo]()
$257
This Cheapflightsfares deal was found by Cheapflights users on 9/24. 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 Cheapflightsfares 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 11/36:25 am -
1 stop15h 56m
Deal found 9/24![Frontier logo]()
$262
This United Airlines deal was found by Cheapflights users on 9/25. 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 10/244:20 pm -
1 stop6h 19m
Wed 10/282:08 pm -
Nonstop4h 14m
Deal found 9/25![United Airlines logo]()
$267
This Priceline deal was found by Cheapflights users on 9/22. 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.
Mon 10/263:30 pm -
1 stop6h 19m
Tue 11/37:02 am -
Nonstop4h 15m
Deal found 9/22![Multiple Airlines logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 9/25. 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 10/264:20 pm -
1 stop19h 51m
Tue 10/274:53 pm -
1 stop29h 28m
Deal found 9/25![Frontier logo]()
$264
This Priceline deal was found by Cheapflights users on 9/26. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/263:30 pm -
1 stop6h 19m
Wed 10/2812:35 pm -
Nonstop4h 18m
Deal found 9/26![Multiple Airlines logo]()
$266
This Expedia deal was found by Cheapflights users on 9/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am -
1 stop19h 27m
Tue 11/312:41 pm -
Nonstop4h 18m
Deal found 9/27![Multiple Airlines logo]()
$259
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 27, 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 27, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/22. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:30 am -
1 stop19h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Frontier logo]()
$123
This Super.com deal was found by Cheapflights users on 9/22. 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.
Mon 11/96:30 am -
1 stop11h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Frontier logo]()
$124
This Frontier deal was found by Cheapflights users on 9/22. 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 10/206:30 am -
1 stop11h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 9/26. 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 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
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 9/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:20 pm -
1 stop19h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Frontier logo]()
$127
This Cheapflightsfares deal was found by Cheapflights users on 9/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:30 am -
1 stop19h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Frontier logo]()
$128
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Tue 10/272:21 pm -
Nonstop4h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Alaska Airlines logo]()
$129
This Cheapflightsfares deal was found by Cheapflights users on 9/22. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:30 am -
1 stop19h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Frontier logo]()
$133
This United Airlines deal was found by Cheapflights users on 9/24. 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 10/242:32 pm -
1 stop8h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![United Airlines logo]()
$134
This Frontier deal was found by Cheapflights users on 9/24. 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.
Fri 11/136:30 am -
1 stop11h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Frontier logo]()
$135
This Super.com deal was found by Cheapflights users on 9/24. 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.
Thu 10/223:30 pm -
1 stop6h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Frontier logo]()
$136
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 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $253 (Cheapflightsfares) |
One-way from | $123 (Cheapflightsfares) |
Popular in | July |
Cheapest in | February |
Average price | $368 |
Good round-trip deal | $290 or less |
Good one-way deal | $174 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 27, 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
Tue 10/27
2:21 pm-5:01 pm
Nonstop4h 40m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$129
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Sat 10/17
2:21 pm-5:01 pm
Nonstop4h 40m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$129
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Tue 11/3
8:50 am-11:27 am
Nonstop4h 37m
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
Tue 10/27
5:27 am-11:13 am
1 stop7h 46m
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
Sat 11/14
7:00 am-9:27 am
Nonstop4h 27m
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 10/17
2:32 pm-8:45 pm
1 stop8h 13m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$144
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Sat 10/24
5:27 am-11:13 am
1 stop7h 46m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$156
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Wed 12/23
6:00 am-11:35 am
1 stop7h 35m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$159
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Sun 11/22
2:16 pm-5:01 pm
Nonstop4h 45m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$169
ChicagoSan Diego
ORD Chicago O'Hare Intl - SAN San Diego
ORDSAN
Chicago O'Hare Intl
Thu 10/29
2:21 pm-5:01 pm
Nonstop4h 40m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$169
Showing 1-10 of 22 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 Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | 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, February is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to San Diego (average of $256). 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 27, 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 14% 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 September 19, 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 27, 2026.
See what other customers who have flown with Alaska Airlines,Delta, 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.
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Entertainment
7.0
Food
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Entertainment
7.0
Food
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Entertainment
7.0
Food
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Entertainment
7.0
Food
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Entertainment
7.0
Food
7.0
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Entertainment
7.0
Food
7.0
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?
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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 27, 2026.
Other flights from O'Hare Intl
Browse through other flights departing from O'Hare Intl. Flights are based on user searches made on Cheapflights and were last updated on September 27, 2026.
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Explore flights to San Diego departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 27, 2026.
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 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$126 | Average$274 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$153 | Average$230 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$156 | Average$312 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$160 | Average$344 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$167 | Average$332 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$186 | Average$296 | FlexibilityNo cancel fee | On-timeN/A |