--- title: "Cancun (CUN) to Seattle (SEA) flights: who flies it" description: "Delta Air Lines and Alaska Airlines fly nonstop from CUN to SEA, about 12 flights a week, scheduled at 6h 40m. Upgrade and award space by date on 2LNR, next 14 days free." canonical: "https://2lnr.com/routes/cun-sea" url: "https://2lnr.com/routes/cun-sea.md" date_modified: "2026-10-18T05:10:47Z" --- # Cancun to Seattle (CUN-SEA): nonstop upgrade & award space Delta Air Lines and Alaska Airlines fly the CUN to SEA nonstop about 12 times a week. The timetable below shows the nonstop scheduled at 6h 40m for the 2,684 miles. 2LNR checks confirmed upgrade and award space on Delta Air Lines and Alaska Airlines flights on this route, so you can see which departures have space before you book. 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 CUN to SEA on the interactive map [Get started free](https://2lnr.com/login) 12 Flights a week, 4-week average 6h 40m Scheduled flight time 2,684 mi Nonstop distance Free To get started ## Cancun to Seattle flight schedule Scheduled nonstop departures for CUN to SEA 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 Cancun (CUN) to Seattle (SEA) | Date | Flight | Airline | Departs CUN | Arrives SEA | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Mon, Nov 9 | DL 604 | Delta Air Lines | 17:25 | 21:05 | 6h 40m | [Airbus A321neo family](https://2lnr.com/seatmaps/dl/a321neo.md) | | Tue, Nov 10 | DL 604 | Delta Air Lines | 17:25 | 21:05 | 6h 40m | Airbus A321neo family | | Wed, Nov 11 | DL 604 | Delta Air Lines | 17:25 | 21:05 | 6h 40m | Airbus A321neo family | | Thu, Nov 12 | DL 604 | Delta Air Lines | 17:25 | 21:05 | 6h 40m | Airbus A321neo family | | Fri, Nov 13 | DL 604 | Delta Air Lines | 17:25 | 21:05 | 6h 40m | Airbus A321neo family | | Sat, Nov 14 | DL 604 | Delta Air Lines | 17:25 | 21:05 | 6h 40m | Airbus A321neo family | | Sun, Nov 15 | DL 604 | Delta Air Lines | 17:25 | 21:05 | 6h 40m | Airbus A321neo family | Showing all 7 scheduled CUN to SEA 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 CUN to SEA date on the interactive map ## Aircraft on the Cancun to Seattle nonstop Delta Air Lines flies the [Airbus A321neo family](https://2lnr.com/seatmaps/dl/a321neo.md) on every departure in the schedule table on this page. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## Confirmed upgrade & award space on CUN to SEA departures 2LNR tracks confirmed upgrade and award space on Delta Air Lines and Alaska Airlines, segment by segment and date by date. Open the calendar for Cancun to Seattle to see which departures have space, the next 14 days free on every product and the full horizon on Pro. ### See real availability Confirmed upgrade or award seats by date on the CUN to SEA departures 2LNR tracks, checked against live inventory so you know what's open before you book. ### Set an alert Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking. ### Plan on the map See CUN to SEA on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Cancun to Seattle nonstop Carriers operating CUN to SEA nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date. - [Delta Air Lines (DL) route map](https://2lnr.com/routes/airlines/dl.md)\ [The aircraft DL flies](https://2lnr.com/seatmaps/dl.md) - [Alaska Airlines (AS) route map](https://2lnr.com/routes/airlines/as.md)\ [The aircraft AS flies](https://2lnr.com/seatmaps/as.md) See CUN to SEA on the interactive map → ## Frequently asked questions about CUN to SEA **How long is the flight from Cancun (CUN) to Seattle (SEA)?** DL 604 is scheduled at 6h 40m from Cancun (CUN) to Seattle (SEA) on every departure in the schedule table on this page. The nonstop covers about 2,684 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from CUN to SEA?** Delta Air Lines and Alaska Airlines fly CUN to SEA nonstop. 2LNR tracks confirmed upgrade and award space on Delta Air Lines and Alaska Airlines. **How many flights a week are there from CUN to SEA?** About 12 nonstop flights a week run between Cancun (CUN) and Seattle (SEA) in the current schedule, operated by Delta Air Lines and Alaska Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from CUN to SEA depart?** In the next 7 days with service, every scheduled CUN to SEA nonstop leaves at 17:25 local time at Cancun. The schedule table on this page lists each departure by date. **Which flights operate CUN to SEA nonstop?** Delta Air Lines flies DL 604 nonstop from Cancun (CUN) to Seattle (SEA), the only flight number in the schedule table on this page. The table lists each date with its departure and arrival times and aircraft. **How do I check upgrade or award availability on CUN to SEA?** Open the CUN to SEA route on the interactive map or the matrix to see confirmed upgrade and award space by date on Delta Air Lines and Alaska Airlines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens. Flying the other way? See [SEA to CUN upgrade and award space](https://2lnr.com/routes/sea-cun.md). Award seats rather than schedules? See [Delta Air Lines award availability](https://2lnr.com/awards/dl.md) or [Alaska Airlines award availability](https://2lnr.com/awards/as.md). Looking beyond this route? See [every route from Cancun (CUN)](https://2lnr.com/routes/cun.md), or [every route from Seattle (SEA)](https://2lnr.com/routes/sea.md). Nonstops from Cancun (CUN) to other airports within 150 miles of Seattle (SEA): - [Cancun (CUN) to Victoria (YYJ)](https://2lnr.com/routes/cun-yyj.md), 97 miles from SEA - [Cancun (CUN) to Vancouver (YVR)](https://2lnr.com/routes/cun-yvr.md), 127 miles from SEA - [Cancun (CUN) to Portland (PDX)](https://2lnr.com/routes/cun-pdx.md), 129 miles from SEA Distances are great-circle between the airports, not driving distance. - [How Delta upgrades clear](https://2lnr.com/about/dl/upgrades.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## Never miss CUN to SEA upgrade or award space See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)