United offers Priority Boarding to Zone 2, ensuring overhead bin space for your carry-on.
United's Economy Plus seats offer up to six inches more legroom than standard economy.

| Low season | April | 
|---|---|
| High season | November | 
| Cheapest flight | £35 | 
Direct departures
San Diego to Denver Intl
Monday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Tuesday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Wednesday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Thursday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Friday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Saturday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Sunday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Direct returns
Denver Intl to San Diego
Monday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Tuesday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Wednesday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Thursday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Friday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Saturday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
Sunday
Alaska Airlines, Frontier, Southwest, +1 more
Alaska Airlines, Frontier, +2 more
1
| Transportation mode | Average price | Average duration | 
|---|---|---|
| Flights | £467 | 2h 20m | 
| Buses | £185 | 29h 33m | 
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