# Who flies Cincinnati → Denver nonstop?

**4 airlines fly Cincinnati → Denver nonstop: Allegiant Air, Frontier Airlines, Southwest Airlines and United Airlines.**

| Airline | Routes | Book direct |
|---|---|---|
| Allegiant Air | Cincinnati/Northern Kentucky (CVG) → Denver (DEN) | https://www.allegiantair.com/ |
| Frontier Airlines | Cincinnati/Northern Kentucky (CVG) → Denver (DEN) | https://www.flyfrontier.com/ |
| Southwest Airlines | Cincinnati/Northern Kentucky (CVG) → Denver (DEN) | https://www.southwest.com/ |
| United Airlines | Cincinnati/Northern Kentucky (CVG) → Denver (DEN) | https://www.united.com |

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Compare fares for CVG-DEN: [Trip.com](https://www.trip.com/flights/cincinnati-to-denver/tickets-CVG-DEN/?allianceid=1094387&sid=2209817&trip_sub1=c4c6f3cbcbb845d69061b1005-713359) · [Aviasales](https://www.aviasales.com/search/CVG0911DEN1?marker=713359). Affiliate links (Trip.com, Aviasales): picktheflight may earn a commission. It never changes the price or which airlines are listed.

On picktheflight: https://picktheflight.com/?from=CVG&to=DEN · JSON: https://picktheflight.com/intents/CVG/DEN

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Data built 2026-10-12 from airline schedule tables on Wikipedia ("Airlines and destinations"), matched by exact airport article; airline booking sites from Wikidata. Schedules change. Confirm the flight on the airline's own site before booking.