Cheap flights from Ontario to Sanya from $1,389 ONT → SYX
Ontario International Airport (ONT) → Sanya Phoenix International Airport (SYX)
The cheapest return found recently is $1,389 with Frontier Airlines, 4 Jan 2027 – 19 Jan 2027, found 2 days ago.
- Cheapest return found recently
- $1,389, 4 Jan 2027 to 19 Jan 2027
- Usual return price
- $1,396 to $1,530
- Cheapest month to fly
- December 2026, return fares from $1,243 found in the last 7 days
Return
The cheapest return fare on each of 7 departure dates is usually $1,396 to $1,530.
Cheapest return found recently
$1,389
4 Jan 2027 – 19 Jan 2027 · Frontier Airlines
Ontario International Airport (ONT) → Sanya Phoenix International Airport (SYX)
Leaves 8:02 a.m. · Return leaves 11:15 p.m. · 58 h 43 min of travel, both ways together
out 2 stops, back 1 stop
found 2 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$1,389 4 Jan 2027 – 19 Jan 2027found 2 days agoSee prices for these dates
$1,243 8 Dec – 12 Decfound 5 days agoSee prices for these dates
What have prices looked like?
Over 27 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $1,243 to $5,089.
27 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 7 departure dates from 7 Dec to 7 Jan 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
No. We hold 15-night return fares on 1 other departure date within 3 days of 4 Jan 2027, and it is not cheaper.
Every date we hold
10 fares on 7 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 7 Dec – 17 Dec | $1,402 | United Airlines | Ontario International Airport (ONT) → Sanya Phoenix International Airport (SYX) | out 2 stops, back 2 stops | found 5 days ago | See prices for these dates |
| 8 Dec – 12 Dec | $1,243 | Frontier Airlines | Ontario International Airport (ONT) → Sanya Phoenix International Airport (SYX) | out 3 stops, back 3 stops | found 5 days ago | See prices for these dates |
| 9 Dec – 11 Dec | $1,440 | Alaska Airlines | Ontario International Airport (ONT) → Sanya Phoenix International Airport (SYX) | out 3 stops, back 3 stops | found 5 days ago | See prices for these dates |
| 10 Dec – 12 Dec | $1,619 | SkyWest Airlines | Ontario International Airport (ONT) → Sanya Phoenix International Airport (SYX) | out 3 stops, back 3 stops | found 5 days ago | See prices for these dates |
| 4 Jan 2027 – 19 Jan 2027 | $1,389 | Frontier Airlines | Ontario International Airport (ONT) → Sanya Phoenix International Airport (SYX) | out 2 stops, back 1 stop | found 2 days ago | See prices for these dates |
| 5 Jan 2027 – 18 Jan 2027 | $1,429 | Frontier Airlines | Ontario International Airport (ONT) → Sanya Phoenix International Airport (SYX) | out 4 stops, back 2 stops | found 6 days ago | See prices for these dates |
| 7 Jan 2027 – 22 Jan 2027 | $2,538 | United Airlines | Ontario International Airport (ONT) → Sanya Phoenix International Airport (SYX) | out 2 stops, back 1 stop | found 2 days ago | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $1,243.
Airlines on the cheapest dates: Frontier Airlines, United Airlines, Alaska Airlines, SkyWest Airlines.
Premium cabin fares from Ontario to Sanya
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 4 Jan 2027 – 19 Jan 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Sanya?
Return
The cheapest fares were 14 to 29 days before departure.
From the cheapest return each day between 24 Sept and 11 Nov (27 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 14–29 days | $1,263 | $1,243 | Cheapest seen | 14 |
| 30–59 days | $1,429 | $1,243 | +13% | 8 |
| 60–89 days | $2,700 | $2,174 | +114% | 15 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Sanya
56 km from Ontario
$841
$548 less than flying from Ontario
7 Jan 2027 – 22 Jan 2027 · LAX → SYX · out 1 stop, back 1 stop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 4 Jan 2027 – 19 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Ontario to Sanya?
The cheapest return found recently is $1,389 with Frontier Airlines, 4 Jan 2027 to 19 Jan 2027, found 2 days ago. The cheapest return we hold, of any age, is $1,243 with Frontier Airlines, 8 Dec to 12 Dec, found 5 days ago. The cheapest return fare on each of 7 departure dates is usually $1,396 to $1,530.
What is the cheapest month to fly from Ontario to Sanya?
December 2026 is the cheapest month for a return, from $1,243, 8 Dec to 12 Dec, found 5 days ago.
How far ahead should I book a flight from Ontario to Sanya?
In 27 days of prices between 24 Sept and 11 Nov, return fares were cheapest 14 to 29 days before departure.
Which airlines have the cheapest flights from Ontario to Sanya?
Between 7 Dec and 7 Jan 2027, Frontier Airlines has the cheapest return on 3 of the 7 departure dates we hold, United Airlines on 2 and Alaska Airlines on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work