--- title: "Alliance (AIA) to Denver (DEN) flights: who flies it" description: "Key Lime Air flies Alliance (AIA) to Denver (DEN) nonstop about 12 times a week as KG 4212 and KG 4235, scheduled at 1h. See the full timetable and who flies it on 2LNR." canonical: "https://2lnr.com/routes/aia-den" url: "https://2lnr.com/routes/aia-den.md" date_modified: "2026-10-18T05:10:47Z" --- # Alliance to Denver (AIA-DEN): nonstop flights and who flies them Key Lime Air flies the AIA to DEN nonstop about 12 times a week. In the timetable below it flies as KG 4212 and KG 4235, scheduled at 1h for the 180 miles. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 23, 2026. See AIA to DEN on the interactive map [Get started free](https://2lnr.com/login) 12 Flights a week, 4-week average 1h Scheduled flight time 180 mi Nonstop distance Free To get started ## Alliance to Denver flight schedule Scheduled nonstop departures for AIA to DEN starting October 23, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Alliance (AIA) to Denver (DEN) | Date | Flight | Airline | Departs AIA | Arrives DEN | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Fri, Oct 23 | KG 4235 | Key Lime Air | 07:30 | 08:30 | 1h | SWM | | Fri, Oct 23 | KG 4212 | Key Lime Air | 13:00 | 14:00 | 1h | SWM | | Sat, Oct 24 | KG 4235 | Key Lime Air | 07:30 | 08:30 | 1h | SWM | | Sat, Oct 24 | KG 4212 | Key Lime Air | 13:00 | 14:00 | 1h | SWM | | Sun, Oct 25 | KG 4235 | Key Lime Air | 07:30 | 08:30 | 1h | SWM | | Sun, Oct 25 | KG 4212 | Key Lime Air | 13:00 | 14:00 | 1h | SWM | | Mon, Oct 26 | KG 4235 | Key Lime Air | 07:30 | 08:30 | 1h | SWM | | Mon, Oct 26 | KG 4212 | Key Lime Air | 13:00 | 14:00 | 1h | SWM | | Tue, Oct 27 | KG 4235 | Key Lime Air | 07:30 | 08:30 | 1h | SWM | | Tue, Oct 27 | KG 4212 | Key Lime Air | 13:00 | 14:00 | 1h | SWM | | Wed, Oct 28 | KG 4235 | Key Lime Air | 07:30 | 08:30 | 1h | SWM | | Wed, Oct 28 | KG 4212 | Key Lime Air | 13:00 | 14:00 | 1h | SWM | | Thu, Oct 29 | KG 4235 | Key Lime Air | 07:30 | 08:30 | 1h | SWM | Showing all 13 scheduled AIA to DEN departures across 7 days with service, starting October 23, 2026. Later dates are on the interactive map. Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every AIA to DEN date on the interactive map ## Aircraft on the Alliance to Denver nonstop Key Lime Air flies the Fairchild-Swearingen Metro/Merlin on every departure in the schedule table on this page. ## The full AIA to DEN nonstop schedule This page carries the full AIA to DEN nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below. ### See the schedule Who operates each AIA to DEN nonstop and how often it runs, from 2LNR's schedule data. ### Plan on the map See AIA to DEN on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Alliance to Denver nonstop Carriers operating AIA to DEN nonstop in the current schedule. - [Key Lime Air (KG) route map](https://2lnr.com/routes/airlines/kg.md)\ [The aircraft KG flies](https://2lnr.com/seatmaps/kg.md) See AIA to DEN on the interactive map → ## Frequently asked questions about AIA to DEN **How long is the flight from Alliance (AIA) to Denver (DEN)?** Every departure in the schedule table on this page is scheduled at 1h from Alliance (AIA) to Denver (DEN). The nonstop covers about 180 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from AIA to DEN?** Key Lime Air is currently the only airline flying AIA to DEN nonstop. 2LNR doesn't show award or upgrade space for it on AIA to DEN, so this page carries the schedule rather than a space claim. **How many flights a week are there from AIA to DEN?** About 12 nonstop flights a week run between Alliance (AIA) and Denver (DEN) in the current schedule, operated by Key Lime Air. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from AIA to DEN depart?** Scheduled AIA to DEN nonstops in the next 7 days with service leave between 07:30 and 13:00, local time at Alliance. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate AIA to DEN nonstop?** In the schedule table on this page, AIA to DEN nonstops fly as KG 4212 and KG 4235 on Key Lime Air. The table lists each departure by date with its times and aircraft. **Does 2LNR show upgrade or award space on AIA to DEN?** Not on this route: 2LNR doesn't show award or upgrade space for Key Lime Air on AIA to DEN. The page carries the full AIA to DEN nonstop schedule and who flies each departure, and the reverse direction is linked below. Flying the other way? See [DEN to AIA nonstop flights](https://2lnr.com/routes/den-aia.md). Award seats rather than schedules? See [award availability by airline](https://2lnr.com/awards.md). Looking beyond this route? See [every route from Alliance (AIA)](https://2lnr.com/routes/aia.md), or [every route from Denver (DEN)](https://2lnr.com/routes/den.md). Nonstops to Denver (DEN) from other airports within 150 miles of Alliance (AIA): - [Scottsbluff (BFF) to Denver (DEN)](https://2lnr.com/routes/bff-den.md), 42 miles from AIA - [Chadron (CDR) to Denver (DEN)](https://2lnr.com/routes/cdr-den.md), 56 miles from AIA - [Cheyenne (CYS) to Denver (DEN)](https://2lnr.com/routes/cys-den.md), 121 miles from AIA - [North Platte (LBF) to Denver (DEN)](https://2lnr.com/routes/lbf-den.md), 127 miles from AIA - [Rapid City (RAP) to Denver (DEN)](https://2lnr.com/routes/rap-den.md), 138 miles from AIA Distances are great-circle between the airports, not driving distance. - [How to plan an upgrade by route](https://2lnr.com/guides/upgrade-strategy.md) ## See the full AIA to DEN nonstop schedule Every scheduled departure on this route, with who flies it. 2LNR shows upgrade and award space by date on the carriers it tracks, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)