Airport route guide

Upgrade & Award Space from Sihanoukville (KOS)

Sihanouk International Airport (KOS) is a small station in Sihanoukville, KH with nonstop service to 7 destinations, served by Angkor Air, AK, and DR. Because the schedule is limited, an upgrade or award opening on a Siem Reap flight rarely lasts. 2LNR checks every KOS nonstop for confirmed availability, so a rare opening doesn't go unnoticed.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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7
Nonstop destinations
30+
Airlines in award search
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Confirmed upgrade & award space on every KOS route

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Pick any Sihanoukville destination below to open a calendar of departures with real availability, or watch a route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each KOS route, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch a Sihanoukville route and 2LNR notifies you when space appears.

Plan on the map

Explore every KOS nonstop on the interactive route map, with connections and route statistics.

All nonstop destinations from Sihanoukville (KOS)

7 nonstop destinations with active service from Sihanouk International Airport. Each route links to its confirmed upgrade and award availability.

Explore KOS routes on the interactive map →

Frequently asked questions about Sihanoukville (KOS)

How many nonstop destinations does Sihanouk International Airport (KOS) serve?
Sihanouk International Airport has active nonstop service to 7 destinations. The busiest markets from KOS are Siem Reap, Ho Chi Minh City, and Kuala Lumpur. The full list, with live upgrade and award availability for each route, is on this page.
Which airlines fly upgrade-trackable routes from KOS?
Angkor Air, AK, and DR operate the most tracked routes from Sihanoukville, in that order. 2LNR covers upgrade and award space on more than 30 airlines, so other carriers serving KOS appear on their routes as well.
How do I check upgrade or award availability from KOS?
Pick any destination on this page, such as Siem Reap, to open a calendar of KOS departures with confirmed upgrade and award space, date by date. You can also set an alert so 2LNR notifies you when space opens on a route you care about.
Does 2LNR track flights from KOS?
Yes. Every active nonstop route from Sihanouk International Airport is tracked, 7 destinations in total, and what's shown is confirmed availability rather than a forecast. It's free to start.

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