Cheapest one-way flights from San Diego to Denver in April from $28

AirHint found the following cheapest one-way flights from San Diego (SAN) to Denver (DEN) in April 2026 (see full year).

One-Way flights

01 Apr Frontier Airlines direct
13 Apr Frontier Airlines direct
06 Apr Frontier Airlines direct
02 Apr Frontier Airlines direct
05 Apr Frontier Airlines direct
03 Apr Frontier Airlines direct
16 Apr Alaska Airlines direct
19 Apr Alaska Airlines direct
09 Apr Frontier Airlines
09 Apr Frontier Airlines direct

Also check the deals for return flights from San Diego to Denver in April.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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