Domestic route
Cheap flights from San Diego to Denver
San Diego International Airport (SAN) to Denver International Airport (DEN). 852 miles, 2h 10m nonstop.
SAN to DEN 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 Friday
- Time difference
- 1h aheadDenver vs San Diego
San Diego to Denver
Round trips from $69
Per traveler, taxes and fees included. Lowest fare we found departs Wed, Jan 6.
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 WhatsAppSan Diego to Denver 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 San Diego to Denver
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 SAN to DEN 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 $69; September 2026 is the most expensive at $90 and up, a difference of $21 per traveler.
- Departing on a Tuesday averages 18% less than a Friday 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
Denver: Mile-high base camp for the Rockies
Denver International is the third-busiest airport in the country and a hub for United, Southwest and Frontier, which keeps fares low from every direction. The city itself is a lively base for the Rockies, with ski resorts 90 minutes away.
Best time to visit: June–September for hiking and Red Rocks concerts; December–March for skiing. Spring can swing from snow to 70°F in a week; September is dependably dry and golden.
Flying the other way? Denver to San DiegoFares, airlines and tips for DEN to SAN.Ready to compare live fares?
See every airline on SAN–DEN side by side with bags and seat rules spelled out.
Search San Diego to DenverSan Diego to Denver: common questions
How long is the flight from San Diego to Denver?
A nonstop flight from San Diego (SAN) to Denver (DEN) 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 SAN to DEN?
United Airlines, Southwest Airlines, Alaska Airlines, Spirit Airlines, Frontier Airlines and Breeze Airways operate nonstop flights from San Diego (SAN) to Denver (DEN), 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 San Diego to Denver?
Over the next six months, January 2027 has the lowest round-trip fares from San Diego (SAN) to Denver (DEN), starting at $69 per traveler including taxes and fees. Within any month, Tuesday departures average the lowest prices.
How far in advance should I book San Diego to Denver 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 San Diego and Denver?
Denver is 1 hour ahead of San Diego. SAN is on America/Los Angeles time and DEN on America/Denver 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.
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