Santa Rosa (STS) to Ontario (ONT) flights
An economy award from Santa Rosa (STS) to Ontario (ONT) starts at 4,500 miles one way with Alaska Atmos Rewards on Alaska Airlines, plus taxes and fees from $5.60. One airline flies nonstop from Santa Rosa (STS) to Ontario (ONT): Alaska Airlines. The two airports are 423 miles (680 km) apart. Alaska Airlines is in oneworld. There are also 5 ways to fly it with one stop, through Las Vegas, Phoenix and Boise and more.
How many miles STS to ONT costs
Economy, one way, on the nonstop flights, from the Award Flight Pricer's award charts. Ranges run off-peak to peak; "from" is the floor of a dynamic price.
| Program | Economy | Taxes and fees |
|---|---|---|
| Alaska Atmos RewardsOn Alaska Airlines | 4,500 | $5.60 |
| Iberia ClubOn Alaska Airlines | 6,000 | $5.60 |
| Qatar Airways Privilege ClubOn Alaska Airlines | 9,500 | $5.60 |
| Cathay Pacific Asia MilesOn Alaska Airlines | 10,000 | $5.60 |
| Starlux (COSMILE)On Alaska Airlines | 10,000 | $38.60 |
| Qantas Frequent FlyerOn Alaska Airlines | 11,500 | $5.60 |
| British Airways ClubOn Alaska Airlines | 12,000 | $5.60 |
| JAL Mileage BankOn Alaska Airlines | 12,000 | $5.60 |
| American AAdvantageOn Alaska Airlines | 12,500 | $5.60 |
| Finnair PlusOn Alaska Airlines | 17,500 | $5.60 |
Business and first class prices are in the Award Flight Pricer. Chart prices need award space on your date, so search it before you transfer points.
Compare every program in the Award Flight PricerAirlines flying nonstop from STS to ONT
- Alaska Airlinesoneworld · bookable with 9 programsWho books it
Book STS to ONT with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Alaska Atmos RewardsBooks Alaska Airlines
- American AAdvantageBooks Alaska Airlines
- British Airways ClubBooks Alaska Airlines
- Cathay Pacific Asia MilesBooks Alaska Airlines
- Finnair PlusBooks Alaska Airlines
- Iberia ClubBooks Alaska Airlines
- JAL Mileage BankBooks Alaska Airlines
- Qantas Frequent FlyerBooks Alaska Airlines
- Qatar Airways Privilege ClubBooks Alaska Airlines
STS to ONT with one stop
5 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Las Vegas (LAS)Southwest Airlines the whole way
- Via Phoenix (PHX)American Airlines the whole way
- Via Boise (BOI)Alaska Airlines the whole way
- Via Salt Lake City (SLC)Delta Air Lines the whole way
- Via Portland (PDX)Alaska Airlines the whole way
STS to ONT: common questions
How many miles does STS to ONT cost?
In economy it starts at 4,500 miles one way with Alaska Atmos Rewards on Alaska Airlines, plus taxes and fees from $5.60. Next cheapest: Iberia Club (6,000), Qatar Airways Privilege Club (9,500) and Cathay Pacific Asia Miles (10,000). These are award chart prices from the Award Flight Pricer. Programs that price dynamically can cost more on busy dates, so check yours before you transfer points. Business and first class prices are in the pricer too.
Which airlines fly nonstop from STS to ONT?
Alaska Airlines (oneworld) flies nonstop from Santa Rosa (STS) to Ontario (ONT).
How far is Santa Rosa from Ontario by plane?
Santa Rosa (STS) and Ontario (ONT) are 423 miles (680 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book STS to ONT award flights?
9 programs can book at least one of the nonstop airlines: Alaska Atmos Rewards, American AAdvantage, British Airways Club, Cathay Pacific Asia Miles, Finnair Plus, Iberia Club, JAL Mileage Bank, Qantas Frequent Flyer and 1 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
Where can I connect between Santa Rosa and Ontario?
The most direct connections are through Las Vegas (LAS), Phoenix (PHX), Boise (BOI), Salt Lake City (SLC) and Portland (PDX). On 5 of them the same airline flies both flights, for example Southwest Airlines through Las Vegas.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.