--- title: "Santa Rosa (STS) to Ontario (ONT) flights: who flies it" description: "Alaska Airlines flies nonstop from STS to ONT, about 7 flights a week, scheduled at 1h 33m. See confirmed upgrade and award space by date on 2LNR, the next 14 days free." canonical: "https://2lnr.com/routes/sts-ont" url: "https://2lnr.com/routes/sts-ont.md" date_modified: "2026-10-18T05:10:47Z" --- # Santa Rosa to Ontario (STS-ONT): nonstop upgrade & award space Alaska Airlines flies the STS to ONT nonstop about 7 times a week. In the timetable below it flies as AS 3032, scheduled at 1h 33m for the 422 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 ONT on the interactive map [Get started free](https://2lnr.com/login) 7 Flights a week, 4-week average 1h 33m Scheduled flight time 422 mi Nonstop distance Free To get started ## Santa Rosa to Ontario flight schedule Scheduled nonstop departures for STS to ONT 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 Ontario (ONT) | Date | Flight | Airline | Departs STS | Arrives ONT | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Fri, Oct 23 | AS 3032 | Alaska Airlines, Inc. | 15:32 | 17:05 | 1h 33m | [Embraer E175](https://2lnr.com/seatmaps/as/e175.md) | | Sat, Oct 24 | AS 3032 | Alaska Airlines, Inc. | 15:32 | 17:05 | 1h 33m | Embraer E175 | | Sun, Oct 25 | AS 3032 | Alaska Airlines, Inc. | 15:32 | 17:05 | 1h 33m | Embraer E175 | | Mon, Oct 26 | AS 3032 | Alaska Airlines, Inc. | 15:32 | 17:05 | 1h 33m | Embraer E175 | | Tue, Oct 27 | AS 3032 | Alaska Airlines, Inc. | 15:32 | 17:05 | 1h 33m | Embraer E175 | | Wed, Oct 28 | AS 3032 | Alaska Airlines, Inc. | 15:32 | 17:05 | 1h 33m | Embraer E175 | | Thu, Oct 29 | AS 3032 | Alaska Airlines, Inc. | 15:32 | 17:05 | 1h 33m | Embraer E175 | Showing all 7 scheduled STS to ONT 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 ONT date on the interactive map ## Aircraft on the Santa Rosa to Ontario nonstop Alaska Airlines flies the [Embraer E175](https://2lnr.com/seatmaps/as/e175.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 STS to ONT 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 Ontario 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 all 13 Santa Rosa to Ontario 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 ONT 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 ONT on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Santa Rosa to Ontario nonstop Carriers operating STS to ONT 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 ONT on the interactive map → ## Frequently asked questions about STS to ONT **How long is the flight from Santa Rosa (STS) to Ontario (ONT)?** AS 3032 is scheduled at 1h 33m from Santa Rosa (STS) to Ontario (ONT) on every departure in the schedule table on this page. The nonstop covers about 422 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from STS to ONT?** Alaska Airlines is currently the only airline flying STS to ONT nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines. **How many flights a week are there from STS to ONT?** About 7 nonstop flights a week run between Santa Rosa (STS) and Ontario (ONT) 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 ONT depart?** In the next 7 days with service, every scheduled STS to ONT nonstop leaves at 15:32 local time at Santa Rosa. The schedule table on this page lists each departure by date. **Which flights operate STS to ONT nonstop?** Alaska Airlines flies AS 3032 nonstop from Santa Rosa (STS) to Ontario (ONT), 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 STS to ONT?** Open the STS to ONT 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 [ONT to STS upgrade and award space](https://2lnr.com/routes/ont-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 Ontario (ONT)](https://2lnr.com/routes/ont.md). Nonstops to Ontario (ONT) from other airports within 150 miles of Santa Rosa (STS): - [Oakland (OAK) to Ontario (ONT)](https://2lnr.com/routes/oak-ont.md), 63 miles from STS - [San Francisco (SFO) to Ontario (ONT)](https://2lnr.com/routes/sfo-ont.md), 65 miles from STS - [Sacramento (SMF) to Ontario (ONT)](https://2lnr.com/routes/smf-ont.md), 66 miles from STS Nonstops from Santa Rosa (STS) to other airports within 150 miles of Ontario (ONT): - [Santa Rosa (STS) to Santa Ana (SNA)](https://2lnr.com/routes/sts-sna.md), 30 miles from ONT - [Santa Rosa (STS) to Burbank (BUR)](https://2lnr.com/routes/sts-bur.md), 45 miles from ONT - [Santa Rosa (STS) to Los Angeles (LAX)](https://2lnr.com/routes/sts-lax.md), 48 miles from ONT - [Santa Rosa (STS) to Palm Springs (PSP)](https://2lnr.com/routes/sts-psp.md), 64 miles from ONT - [Santa Rosa (STS) to San Diego (SAN)](https://2lnr.com/routes/sts-san.md), 94 miles from ONT 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 ONT 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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