--- title: "Santa Rosa (STS) to Seattle (SEA) flights: who flies it" description: "Alaska Airlines flies nonstop from STS to SEA, about 15 flights a week, scheduled at 2h. See confirmed upgrade and award space by date on 2LNR, the next 14 days free." canonical: "https://2lnr.com/routes/sts-sea" url: "https://2lnr.com/routes/sts-sea.md" date_modified: "2026-10-18T05:10:47Z" --- # Santa Rosa to Seattle (STS-SEA): nonstop upgrade & award space Alaska Airlines flies nonstop between Santa Rosa (STS) and Seattle (SEA), roughly 15 times a week. In the timetable below it flies as AS 513 and AS 1348, scheduled at 2h for the 618 miles. 2LNR checks confirmed upgrade and award space on 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 STS to SEA on the interactive map [Get started free](https://2lnr.com/login) 15 Flights a week, 4-week average 2h Scheduled flight time 618 mi Nonstop distance Free To get started ## Santa Rosa to Seattle flight schedule Scheduled nonstop departures for STS 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 Santa Rosa (STS) to Seattle (SEA) | Date | Flight | Airline | Departs STS | Arrives SEA | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Fri, Oct 23 | AS 513 | Alaska Airlines, Inc. | 07:00 | 09:00 | 2h | [Boeing 737-800](https://2lnr.com/seatmaps/as/737-800.md) | | Fri, Oct 23 | AS 1348 | Alaska Airlines, Inc. | 17:06 | 19:06 | 2h | Boeing 737-800 | | Sat, Oct 24 | AS 513 | Alaska Airlines, Inc. | 07:00 | 09:00 | 2h | Boeing 737-800 | | Sat, Oct 24 | AS 1348 | Alaska Airlines, Inc. | 17:06 | 19:06 | 2h | Boeing 737-800 | | Sun, Oct 25 | AS 513 | Alaska Airlines, Inc. | 07:00 | 09:00 | 2h | Boeing 737-800 | | Sun, Oct 25 | AS 1348 | Alaska Airlines, Inc. | 17:06 | 19:06 | 2h | Boeing 737-800 | | Mon, Oct 26 | AS 513 | Alaska Airlines, Inc. | 07:00 | 09:00 | 2h | Boeing 737-800 | | Mon, Oct 26 | AS 1348 | Alaska Airlines, Inc. | 17:06 | 19:06 | 2h | Boeing 737-800 | | Tue, Oct 27 | AS 513 | Alaska Airlines, Inc. | 07:00 | 09:00 | 2h | Boeing 737-800 | | Tue, Oct 27 | AS 1348 | Alaska Airlines, Inc. | 17:06 | 19:06 | 2h | Boeing 737-800 | | Wed, Oct 28 | AS 513 | Alaska Airlines, Inc. | 07:00 | 09:00 | 2h | Boeing 737-800 | | Wed, Oct 28 | AS 1348 | Alaska Airlines, Inc. | 17:06 | 19:06 | 2h | Boeing 737-800 | | Thu, Oct 29 | AS 513 | Alaska Airlines, Inc. | 07:00 | 09:00 | 2h | [Boeing 737 MAX 8](https://2lnr.com/seatmaps/as/737-max-8.md) | | Thu, Oct 29 | AS 1348 | Alaska Airlines, Inc. | 17:06 | 19:06 | 2h | Boeing 737-800 | Showing all 14 scheduled STS 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 STS to SEA date on the interactive map ## Aircraft on the Santa Rosa to Seattle nonstop Alaska Airlines flies the departures in the schedule table on this page with the [Boeing 737-800](https://2lnr.com/seatmaps/as/737-800.md) and the [Boeing 737 MAX 8](https://2lnr.com/seatmaps/as/737-max-8.md). Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## Confirmed upgrade & award space on STS to SEA departures 2LNR tracks confirmed upgrade and award space on Alaska Airlines, segment by segment and date by date. Open the calendar for Santa Rosa to Seattle to see which departures have space, the next 14 days free on every product and the full horizon on Pro. Alaska Airlines award space was open on 12 of the 14 Santa Rosa to Seattle departure dates from October 19 to November 1 that 2LNR checked in the 7 days to October 19, 2026. ### See real availability Confirmed upgrade or award seats by date on the STS 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 STS to SEA on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Santa Rosa to Seattle nonstop Carriers operating STS to SEA nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date. - [Alaska Airlines (AS) route map](https://2lnr.com/routes/airlines/as.md)\ [The aircraft AS flies](https://2lnr.com/seatmaps/as.md) See STS to SEA on the interactive map → ## Frequently asked questions about STS to SEA **How long is the flight from Santa Rosa (STS) to Seattle (SEA)?** Every departure in the schedule table on this page is scheduled at 2h from Santa Rosa (STS) to Seattle (SEA). The nonstop covers about 618 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from STS to SEA?** Alaska Airlines is currently the only airline flying STS to SEA nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines. **How many flights a week are there from STS to SEA?** About 15 nonstop flights a week run between Santa Rosa (STS) and Seattle (SEA) in the current schedule, operated by Alaska Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from STS to SEA depart?** Scheduled STS to SEA nonstops in the next 7 days with service leave between 07:00 and 17:06, local time at Santa Rosa. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate STS to SEA nonstop?** In the schedule table on this page, STS to SEA nonstops fly as AS 513 and AS 1348 on Alaska Airlines. The table lists each departure by date with its times and aircraft. **How do I check upgrade or award availability on STS to SEA?** Open the STS to SEA route on the interactive map or the matrix to see confirmed upgrade and award space by date on 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 STS upgrade and award space](https://2lnr.com/routes/sea-sts.md). Award seats rather than schedules? See [Alaska Airlines award availability](https://2lnr.com/awards/as.md). Looking beyond this route? See [every route from Santa Rosa (STS)](https://2lnr.com/routes/sts.md), or [every route from Seattle (SEA)](https://2lnr.com/routes/sea.md). Nonstops to Seattle (SEA) from other airports within 150 miles of Santa Rosa (STS): - [Oakland (OAK) to Seattle (SEA)](https://2lnr.com/routes/oak-sea.md), 63 miles from STS - [San Francisco (SFO) to Seattle (SEA)](https://2lnr.com/routes/sfo-sea.md), 65 miles from STS - [Sacramento (SMF) to Seattle (SEA)](https://2lnr.com/routes/smf-sea.md), 66 miles from STS - [San Jose (SJC) to Seattle (SEA)](https://2lnr.com/routes/sjc-sea.md), 92 miles from STS - [Redding (RDD) to Seattle (SEA)](https://2lnr.com/routes/rdd-sea.md), 141 miles from STS Nonstops from Santa Rosa (STS) to other airports within 150 miles of Seattle (SEA): - [Santa Rosa (STS) to Portland (PDX)](https://2lnr.com/routes/sts-pdx.md), 129 miles from SEA Distances are great-circle between the airports, not driving distance. - [How Alaska upgrades clear](https://2lnr.com/about/as/upgrades.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## Never miss STS 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. 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