Flights to San Diego from Boulder

View ฿3,570 flight on Thu, 14 Aug 2025Opens in a new window

Popular airlines from Boulder to San Diego

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Cheap Flights from Boulder (DEN) to San Diego (SAN)

Prices were available within the past 7 days and start at ฿3,570 for one-way flights and ฿7,130 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 14 Aug - Wed, 20 Aug
DEN
Denver
SAN
San Diego
฿7,130 Return, found 5 days ago
฿7,130
Return
found 5 days ago
Select Delta flight, departing Thu, 14 Aug from Denver to San Diego, returning Wed, 20 Aug, priced at ฿7,130 found 5 days ago
Delta
Thu, 14 Aug - Wed, 20 Aug
DEN
Denver
SAN
San Diego
฿7,300 Return, found 5 days ago
฿7,300
Return
found 5 days ago
Select Delta flight, departing Thu, 14 Aug from Denver to San Diego, returning Wed, 20 Aug, priced at ฿7,300 found 5 days ago
Delta
Thu, 14 Aug - Wed, 20 Aug
DEN
Denver
SAN
San Diego
฿7,475 Return, found 5 days ago
฿7,475
Return
found 5 days ago
Select Delta flight, departing Thu, 14 Aug from Denver to San Diego, returning Wed, 20 Aug, priced at ฿7,475 found 5 days ago
Delta
Thu, 14 Aug - Wed, 20 Aug
DEN
Denver
SAN
San Diego
฿7,625 Return, found 5 days ago
฿7,625
Return
found 5 days ago
Select Delta flight, departing Thu, 14 Aug from Denver to San Diego, returning Wed, 20 Aug, priced at ฿7,625 found 5 days ago
United
Thu, 14 Aug - Wed, 20 Aug
DEN
Denver
SAN
San Diego
฿7,960 Return, found 5 days ago
฿7,960
Return
found 5 days ago
Select United flight, departing Thu, 14 Aug from Denver to San Diego, returning Wed, 20 Aug, priced at ฿7,960 found 5 days ago
American Airlines
Thu, 14 Aug - Wed, 20 Aug
DEN
Denver
CLD
Carlsbad
฿8,605 Return, found 5 days ago
฿8,605
Return
found 5 days ago
Select American Airlines flight, departing Thu, 14 Aug from Denver to Carlsbad, returning Wed, 20 Aug, priced at ฿8,605 found 5 days ago

Find the cheapest month to fly from Denver (DEN) to San Diego (SAN)

August is typically the cheapest month to fly

From ฿1,564 - ฿4,175 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.