San Diego to Boulder flights
Boulder lies 1,337 km (831 mi) north-east of San Diego, +1 h on the clock. What the numbers say about getting there, and where to book.
A nonstop flight would take about 2 h 28 min gate to gate, based on the distance and typical cruise speed with taxi and climb allowed for; connecting itineraries add the layover on top.
| San Diego | Boulder | |
|---|---|---|
| Country | United States | United States |
| Population | 1.4 million | 106,803 |
| Elevation | 20 m (66 ft) | 1,630 m (5,348 ft) |
| Time now | UTC-7 (America/Los_Angeles) | UTC-6 (America/Denver) |
| Nearest large airport | SAN, 3 km out | DEN, 54 km out |
| Postal codes | 92101–92199 | 80301–80314 |
Clocks in Boulder are 1 h ahead of San Diego right now, so a 2 h 28 min journey lands 3 h 28 min later by the destination clock.
Airports at each end
Leaving San Diego
San Diego is served by 3 airports with scheduled flights within 100 km. The closest large one is San Diego International Airport (SAN), 3 km (2 mi) from the centre, with a longest runway of 9,401 ft, which limits it to short and medium-haul aircraft. The alternatives are General Abelardo L. Rodriguez International Airport (TIJ, 27 km), McClellan-Palomar Airport (CLD, 47 km).
Arriving in Boulder
Boulder is served by 2 airports with scheduled flights within 100 km. The closest large one is Denver International Airport (DEN), 54 km (34 mi) from the centre, whose 16,000-ft runway is long enough for long-haul wide-body aircraft. The alternatives are Rocky Mountain Metropolitan Airport (BJC, 18 km).
| Airport | Code | From centre | Longest runway | Elevation |
|---|---|---|---|---|
| Denver International Airport | DEN | 54 km (34 mi) | 16,000 ft | 5,431 ft |
| Rocky Mountain Metropolitan Airport (regional) | BJC | 18 km (11 mi) | 9,000 ft | 5,673 ft |
Book a flight to Boulder
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Staying in Boulder
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Book a hotel in Boulder
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Common questions
How far is Boulder from San Diego?
1,337 km (831 mi) in a straight line, north-east of San Diego.
How long does it take to get from San Diego to Boulder by air?
About 2 h 28 min, estimated from distance and typical speeds for a nonstop flight. Timetables and traffic decide the real figure.
Is there a time difference between San Diego and Boulder?
Boulder is 1 h ahead at the moment (America/Denver against America/Los_Angeles).
Which airports are used for San Diego to Boulder flights?
Typically San Diego International Airport (SAN) to Denver International Airport (DEN); Boulder also has BJC.
Where these facts come from
- GeoNames (CC BY 4.0): population, elevation, time zone, postal codes
- Wikidata (CC0): area, sister cities, visitor numbers, heritage listings, stations and ports
- OurAirports (public domain): airports, runways
- Natural Earth (public domain): map outlines
Data compiled 14 September 2026. Hotel and hostel figures are from our booking partner’s catalogue on that date. Journey times on this page are estimates from distance, not timetables; check the operator before you rely on one.