Flights to San Diego from US $ 315*
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1 Passenger, Economy
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today
today
United's most popular flights to San Diego (SAN)
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US $
Cancun (CUN)to
San Diego (SAN)24/12/2025 - 31/12/2025
from
US $ 423
Viewed: 23 hours ago
Roundtrip
Economy
Mexico City (MEX)to
San Diego (SAN)18/02/2026 - 04/03/2026
from
US $ 565
Viewed: 21 hours ago
Roundtrip
Economy
Cabo San Lucas (SJD)to
San Diego (SAN)18/02/2026 - 22/02/2026
from
US $ 315
Viewed: 13 hours ago
Roundtrip
Economy
Mérida (MID)to
San Diego (SAN)05/02/2026 - 09/02/2026
from
US $ 494
Viewed: 14 hours ago
Roundtrip
Economy
Puerto Vallarta (PVR)to
San Diego (SAN)06/03/2026 - 10/03/2026
from
US $ 315
Viewed: 13 hours ago
Roundtrip
Economy
Cozumel (CZM)to
San Diego (SAN)12/03/2026 - 26/03/2026
from
US $ 563
Viewed: 16 hours ago
Roundtrip
Economy
Queretaro (QRO)to
San Diego (SAN)29/01/2026 - 02/02/2026
from
US $ 428
Viewed: 13 hours ago
Roundtrip
Economy
Leon (BJX)to
San Diego (SAN)13/03/2026 - 17/03/2026
from
US $ 571
Viewed: 17 hours ago
Roundtrip
Economy
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
Business class deals on flights to San Diego (SAN)
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flight_land
US $
Mexico City (MEX)to
San Diego (SAN)
09/04/2026 - 12/04/2026
Roundtrip
Business
from
US $ 1,201
Viewed: 8 minutes ago
Mérida (MID)to
San Diego (SAN)
06/04/2026 - 10/04/2026
Roundtrip
Business
from
US $ 2,646
Viewed: 7 hours ago
Puerto Vallarta (PVR)to
San Diego (SAN)
16/01/2026 - 16/01/2026
Roundtrip
Business
from
US $ 3,486
Viewed: 1 day ago
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
Things to do after your flight to San Diego (SAN)
Fly to San Diego with United Airlines from over 200 airports within the United States and an additional 100 airports internationally.
San Diego’s top attractions
- Admire the architecture and landscapes at Balboa Park. The park is home to several attractions, including the San Diego Zoo, the Natural History Museum and the Desert Garden.
- Visit the Mission Basilica San Diego de Alcala, the first mission in California.
- Stroll through the Gaslamp Quarter.
- Take a boat ride around San Diego Bay.
- Grab a glimpse into the past at Old Town San Diego State Historic Park.
- Relax at Mission Beach, Coronado Beach or Ocean Beach.
- Go hiking at Torrey Pines State Natural Reserve.
Best time to travel to San Diego
Visit San Diego year-round for mild weather and plenty of events and activities. Winter is the best time to spot migrating whales off the coast, and spring is the perfect time to witness wildflowers in full bloom in the hills. Summer comes alive with many festivals, including the San Diego County Fair. You can visit San Diego or nearby cities when you fly to California on United.