Domestic route
Cheap flights from Denver to San Diego
Denver International Airport (DEN) to San Diego International Airport (SAN). 852 miles, 2h 10m nonstop.
DEN to SAN at a glance
Computed from airline schedules and the fares we track for this route. Refreshed several times a day.
- Distance
- 852 milesgreat-circle
- Typical flight time
- 2h 10mnonstop, gate to gate
- Nonstop airlines
- UAWNASNK6 airlinesUnited, Southwest, Alaska
- Nonstop flights per day
- 29all airlines combined
- Cheapest month
- January 2027over the next six months
- Best day to fly
- Tuesday18% less than Sunday
- Time difference
- 1h behindSan Diego vs Denver
Denver to San Diego
Round trips from $70
Per traveler, taxes and fees included. Lowest fare we found departs Tue, Jan 5.
Cheapest month: January 2027
See fares on these datesLock any fare free — pay only when you accept your last-minute deal
Or ask an agent on WhatsAppDenver to San Diego fares by month
Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.
Airlines flying Denver to San Diego
6 airlines fly nonstop with 29 departures a day combined, plus 3 more with one stop.
- WNSouthwest AirlinesLow-costNonstop · 10 flights a day · first checked bag from $35
- ASAlaska AirlinesoneworldNonstop · 7 flights a day · first checked bag from $35
- UAUnited AirlinesStar AllianceNonstop · 5 flights a day · first checked bag from $40
- F9Frontier AirlinesLow-costNonstop · 3 flights a day · first checked bag from $55
- MXBreeze AirwaysLow-costNonstop · 2 flights a day · first checked bag from $45
- NKSpirit AirlinesLow-costNonstop · 2 flights a day · first checked bag from $55
- AAAmerican AirlinesoneworldConnecting via PHX, LAX · first checked bag from $40
- DLDelta Air LinesSkyTeamConnecting via SLC, LAX · first checked bag from $35
- B6JetBlueConnecting via LAX · first checked bag from $40
Connecting options
Hubs where one airline can carry you on both legs, most choices first.
- Los Angeles (LAX)AADLB63 airlines
- Phoenix (PHX)AA1 airline
- Salt Lake City (SLC)DL1 airline
Tips for this route
- United, Southwest, Alaska and Spirit all fly DEN to SAN nonstop, so compare the total with bags before picking the lowest base fare: the difference between a basic and a standard economy ticket is often less than one checked bag each way.
- January 2027 is the cheapest month to fly over the next six months, with round trips from $70; September 2026 is the most expensive at $97 and up, a difference of $27 per traveler.
- Departing on a Tuesday averages 18% less than a Sunday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
- Fares on this route are usually lowest 4 to 8 weeks before departure and rise sharply inside two weeks.
Destination guide
San Diego: 70 degrees, 70 miles of coastline
San Diego has the most reliable weather of any big US city and an airport ten minutes from downtown. Balboa Park, the zoo, La Jolla's coves and a fish-taco culture make it an easy, relaxed beach trip with strong fare competition from Southwest and Alaska.
Best time to visit: September–November is the warmest ocean and clearest skies. Spring is pleasant but 'May gray' fog is common at the coast; summer is peak for families. Winter is mild and inexpensive.
Flying the other way? San Diego to DenverFares, airlines and tips for SAN to DEN.Ready to compare live fares?
See every airline on DEN–SAN side by side with bags and seat rules spelled out.
Search Denver to San DiegoDenver to San Diego: common questions
How long is the flight from Denver to San Diego?
A nonstop flight from Denver (DEN) to San Diego (SAN) takes about 2h 10m gate to gate, covering 852 miles. Connecting itineraries add the layover, typically 1 to 3 hours more in total.
Which airlines fly nonstop from DEN to SAN?
United Airlines, Southwest Airlines, Alaska Airlines, Spirit Airlines, Frontier Airlines and Breeze Airways operate nonstop flights from Denver (DEN) to San Diego (SAN), with 29 nonstop departures a day between them. One-stop options connect through LAX, PHX and SLC.
What is the cheapest month to fly from Denver to San Diego?
Over the next six months, January 2027 has the lowest round-trip fares from Denver (DEN) to San Diego (SAN), starting at $70 per traveler including taxes and fees. Within any month, Tuesday departures average the lowest prices.
How far in advance should I book Denver to San Diego flights?
Fares on this route are usually lowest 4 to 8 weeks before departure and rise sharply inside two weeks. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.
What is the time difference between Denver and San Diego?
San Diego is 1 hour behind Denver. DEN is on America/Denver time and SAN on America/Los Angeles time. Departure and arrival times in search results are always shown in local time at each airport.
Related routes
Other popular city pairs from the same departure city and to the same destination, with the lowest round-trip fares we found.
More flights from Denver
All routesMore flights to San Diego
All routes- New York to San DiegoJFK → SANfrom $191
- Chicago to San DiegoORD → SANfrom $129
- Dallas to San DiegoDFW → SANfrom $112
- Los Angeles to San DiegoLAX → SANfrom $44
- San Francisco to San DiegoSFO → SANfrom $52
- Seattle to San DiegoSEA → SANfrom $106
- Las Vegas to San DiegoLAS → SANfrom $62
- San Jose to San DiegoSJC → SANfrom $58