$64+ Cheap flights from San Antonio to Ontario (SAT - ONT)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ONT
Mar 1 — Mar 81
1 adult, Economy
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Find cheap flights from San Antonio to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from San Antonio to Ontario
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Cheapest flights from San Antonio to OntarioExplore the most affordable flight options available from San Antonio to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 30, 2026.
Explore the most affordable flight options available from San Antonio to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 30, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:12 pm
SAT
- ONT
1 stop17h 22m
Frontier
Wed 3/48:40 am
ONT
- SAT
1 stop6h 35m
Frontier
Deal found 1/29![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/111:35 am
SAT
- ONT
1 stop27h 36m
Frontier
Sat 3/76:15 am
ONT
- SAT
1 stop16h 02m
Frontier
Deal found 1/30![Frontier logo]()
$131
This Cheapflightsfares deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:36 pm
SAT
- ONT
1 stop5h 58m
Frontier
Sat 2/286:00 am
ONT
- SAT
1 stop11h 01m
Frontier
Deal found 1/29![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:45 am
SAT
- ONT
1 stop19h 14m
Frontier
Tue 3/246:15 am
ONT
- SAT
1 stop16h 02m
Frontier
Deal found 1/30![Frontier logo]()
$150
This Gotogate deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/217:56 pm
SAT
- ONT
1 stop6h 03m
Frontier
Sat 2/286:00 am
ONT
- SAT
1 stop11h 01m
Frontier
Deal found 1/30![Frontier logo]()
$154
This Cheapflightsfares deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/35:36 pm
SAT
- ONT
1 stop5h 58m
Frontier
Thu 3/53:24 pm
ONT
- SAT
1 stop17h 16m
Frontier
Deal found 1/29![Frontier logo]()
$162
This Cheapflightsfares deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:56 pm
SAT
- ONT
1 stop14h 03m
Frontier
Wed 2/187:17 pm
ONT
- SAT
1 stop23h 28m
Frontier
Deal found 1/28![Frontier logo]()
$163
This Frontier deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:56 pm
SAT
- ONT
1 stop6h 03m
Frontier
Mon 3/26:10 am
ONT
- SAT
1 stop11h 27m
Frontier
Deal found 1/29![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1610:05 am
SAT
- ONT
1 stop15h 54m
Frontier
Tue 3/246:15 am
ONT
- SAT
1 stop16h 02m
Frontier
Deal found 1/29![Frontier logo]()
$165
This Cheapflightsfares deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/287:56 pm
SAT
- ONT
1 stop14h 03m
Frontier
Sat 3/77:10 pm
ONT
- SAT
1 stop12h 30m
Frontier
Deal found 1/30![Frontier logo]()
$172
Best flights from San Antonio to OntarioDiscover carefully curated flight deals from San Antonio to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 30, 2026.
Discover carefully curated flight deals from San Antonio to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/17:07 pm
SAT
- ONT
2 stops24h 41m
Frontier
Sat 3/76:15 am
ONT
- SAT
1 stop16h 02m
Frontier
Deal found 1/30![Frontier logo]()
$171
This Frontier deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:14 pm
SAT
- ONT
1 stop10h 41m
Frontier
Tue 4/2812:59 am
ONT
- SAT
1 stop11h 20m
Frontier
Deal found 1/30![Frontier logo]()
$180
This CheapOair deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/58:25 pm
SAT
- ONT
1 stop5h 34m
Frontier
Wed 3/186:15 am
ONT
- SAT
1 stop24h 51m
Frontier
Deal found 1/29![Frontier logo]()
$204
This Frontier deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/1511:35 am
SAT
- ONT
1 stop11h 58m
Frontier
Sat 2/286:00 am
ONT
- SAT
1 stop11h 01m
Frontier
Deal found 1/29![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/1510:05 am
SAT
- ONT
1 stop15h 54m
Frontier
Tue 3/242:23 pm
ONT
- SAT
2 stops31h 54m
Frontier
Deal found 1/29![Frontier logo]()
$222
This Cheapflightsfares deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/268:20 pm
SAT
- ONT
1 stop5h 39m
Frontier
Sun 3/110:14 pm
ONT
- SAT
1 stop20h 30m
Frontier
Deal found 1/30![Frontier logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/66:45 am
SAT
- ONT
1 stop19h 14m
Frontier
Sun 3/86:15 am
ONT
- SAT
1 stop24h 51m
Frontier
Deal found 1/30![Frontier logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/1511:35 am
SAT
- ONT
1 stop11h 58m
Frontier
Wed 2/257:17 pm
ONT
- SAT
1 stop18h 30m
Frontier
Deal found 1/30![Frontier logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/256:45 am
SAT
- ONT
1 stop19h 14m
Frontier
Sun 3/298:07 am
ONT
- SAT
2 stops38h 10m
Frontier
Deal found 1/30![Frontier logo]()
$257
This Frontier deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/238:22 pm
SAT
- ONT
1 stop5h 37m
Frontier
Thu 2/266:05 am
ONT
- SAT
1 stop11h 20m
Frontier
Deal found 1/30![Frontier logo]()
$262
This Cheapflightsfares deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/2211:35 am
SAT
- ONT
1 stop27h 36m
Frontier
Tue 2/248:35 am
ONT
- SAT
1 stop6h 06m
Frontier
Deal found 1/30![Frontier logo]()
$275
Last-minute flights from San Antonio to OntarioDiscover last-minute flight deals from San Antonio to Ontario. Data last updated January 30, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Ontario. Data last updated January 30, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/115:12 pm
SAT
- ONT
1 stop18h 22m
Frontier
Sat 2/216:00 am
ONT
- SAT
1 stop11h 01m
Frontier
Deal found 1/29![Frontier logo]()
$184
This Frontier deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/115:12 pm
SAT
- ONT
1 stop6h 22m
Frontier
Sat 2/146:00 am
ONT
- SAT
1 stop11h 01m
Frontier
Deal found 1/30![Frontier logo]()
$201
This Cheapflightsfares deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:56 pm
SAT
- ONT
1 stop14h 03m
Frontier
Wed 2/187:17 pm
ONT
- SAT
1 stop23h 28m
Frontier
Deal found 1/28![Frontier logo]()
$163
This Frontier deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:56 pm
SAT
- ONT
1 stop6h 03m
Frontier
Mon 3/26:10 am
ONT
- SAT
1 stop11h 27m
Frontier
Deal found 1/29![Frontier logo]()
$164
This Frontier deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/157:07 pm
SAT
- ONT
1 stop6h 52m
Frontier
Mon 3/26:10 am
ONT
- SAT
1 stop11h 27m
Frontier
Deal found 1/29![Frontier logo]()
$209
This Frontier deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/175:36 pm
SAT
- ONT
1 stop5h 58m
Frontier
Sat 2/286:00 am
ONT
- SAT
1 stop11h 01m
Frontier
Deal found 1/29![Frontier logo]()
$185
This Gotogate deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/217:56 pm
SAT
- ONT
1 stop6h 03m
Frontier
Sat 2/286:00 am
ONT
- SAT
1 stop11h 01m
Frontier
Deal found 1/30![Frontier logo]()
$154
This Cheapflightsfares deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:36 pm
SAT
- ONT
1 stop5h 58m
Frontier
Sat 2/286:00 am
ONT
- SAT
1 stop11h 01m
Frontier
Deal found 1/29![Frontier logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:36 pm
SAT
- ONT
1 stop5h 58m
Frontier
Wed 2/253:22 pm
ONT
- SAT
1 stop22h 25m
Frontier
Deal found 1/30![Frontier logo]()
$174
This Cheapflightsfares deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:12 pm
SAT
- ONT
1 stop17h 22m
Frontier
Wed 3/48:40 am
ONT
- SAT
1 stop6h 35m
Frontier
Deal found 1/29![Frontier logo]()
$127
This Cheapflightsfares deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/287:56 pm
SAT
- ONT
1 stop14h 03m
Frontier
Sat 3/77:10 pm
ONT
- SAT
1 stop12h 30m
Frontier
Deal found 1/30![Frontier logo]()
$172
One-way flights from San Antonio to OntarioSearch for one-way flight options from San Antonio to Ontario. Find affordable one-way fares based on user searches. Data last updated January 30, 2026.
Search for one-way flight options from San Antonio to Ontario. Find affordable one-way fares based on user searches. Data last updated January 30, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/217:56 pm
SAT
- ONT
1 stop6h 03m
Frontier
Deal found 1/28![Frontier logo]()
$64
This Cheapflightsfares deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/186:12 pm
SAT
- ONT
1 stop17h 22m
Frontier
Deal found 1/28![Frontier logo]()
$70
This Cheapflightsfares deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/287:56 pm
SAT
- ONT
1 stop6h 03m
Frontier
Deal found 1/28![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/111:35 am
SAT
- ONT
1 stop27h 36m
Frontier
Deal found 1/30![Frontier logo]()
$79
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/238:22 pm
SAT
- ONT
1 stop27h 12m
Frontier
Deal found 1/28![Frontier logo]()
$80
This Trip.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/169:39 pm
SAT
- ONT
1 stop17h 32m
Frontier
Deal found 1/29![Frontier logo]()
$82
This Super.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:56 pm
SAT
- ONT
1 stop6h 03m
Frontier
Deal found 1/30![Frontier logo]()
$89
This Cheapflightsfares deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/105:12 pm
SAT
- ONT
1 stop6h 22m
Frontier
Deal found 1/28![Frontier logo]()
$90
This Cheapflightsfares deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/63:14 pm
SAT
- ONT
1 stop10h 41m
Frontier
Deal found 1/28![Frontier logo]()
$96
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/58:25 pm
SAT
- ONT
1 stop5h 34m
Frontier
Deal found 1/28![Frontier logo]()
$99
Find flight deals from San Antonio to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $127 (Cheapflightsfares) |
One-way from | $64 (Cheapflightsfares) |
Popular in | July |
Cheapest in | February |
Average price | $371 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Antonio to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 30, 2026.
Use the filters below to find and compare flights from San Antonio to Ontario that are best for you.
Fly from
San Antonio
Fly to
Ontario
Route
Depart
Return
Price
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sun 3/1
7:07 pm-5:48 pm
2 stops24h 41m
Ontario
Sat 3/7
6:15 am-12:17 am
1 stop16h 02m
$171
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Wed 4/22
3:14 pm-11:55 pm
1 stop10h 41m
Ontario
Tue 4/28
12:59 am-2:19 pm
1 stop11h 20m
$180
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Thu 3/5
8:25 pm-11:59 pm
1 stop5h 34m
Ontario
Wed 3/18
6:15 am-9:06 am
1 stop24h 51m
$204
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sun 2/15
11:35 am-9:33 pm
1 stop11h 58m
Ontario
Sat 2/28
6:00 am-7:01 pm
1 stop11h 01m
$209
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sun 3/15
10:05 am-11:59 pm
1 stop15h 54m
Ontario
Tue 3/24
2:23 pm-12:17 am
2 stops31h 54m
$222
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Thu 2/26
8:20 pm-11:59 pm
1 stop5h 39m
Ontario
Sun 3/1
10:14 pm-8:44 pm
1 stop20h 30m
$235
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Fri 3/6
6:45 am-11:59 pm
1 stop19h 14m
Ontario
Sun 3/8
6:15 am-9:06 am
1 stop24h 51m
$239
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sun 2/15
11:35 am-9:33 pm
1 stop11h 58m
Ontario
Wed 2/25
7:17 pm-3:47 pm
1 stop18h 30m
$241
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Wed 3/25
6:45 am-11:59 pm
1 stop19h 14m
Ontario
Sun 3/29
8:07 am-12:17 am
2 stops38h 10m
$257
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Mon 2/23
8:22 pm-11:59 pm
1 stop5h 37m
Ontario
Thu 2/26
6:05 am-7:25 pm
1 stop11h 20m
$262
Showing 1-10 of 20 results
Compare providers for flights from San Antonio to Ontario
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to Ontario in January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Antonio-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Antonio-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Antonio-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Antonio-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Antonio-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from San Antonio to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from San Antonio with our price prediction graph.
SAT-ONT
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from San Antonio to Ontario
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How far ahead should I book a flight from San Antonio to Ontario?
Use this chart to determine the optimal time to book a round-trip flight from San Antonio to Ontario. Price data was last updated on January 23, 2026.
Booking 64 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Antonio to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from San Antonio to Ontario?
Currently, September is the cheapest month in which you can book a flight from San Antonio to Ontario (average of $61). Flying from San Antonio to Ontario in March is currently the most expensive (average of $108). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What’s the top layover airport for flights from San Antonio to Ontario?
Share of 1-stop round-trip flights from San Antonio to Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.
Phoenix (PHX) – chosen by Cheapflights users on 50% of 1-stop itineraries from San Antonio to Ontario on Cheapflights.
What’s the cheapest layover airport for flights from San Antonio to Ontario?
Average round-trip fare for 1-stop flights from San Antonio to Ontario, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $191.
What’s the fastest layover option from San Antonio to Ontario?
Shortest average travel time for 1-stop one-way flights from San Antonio to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 5h 02m.
Which airport typically offers the quickest layover for flights from San Antonio to Ontario?
Average layover duration for 1-stop one-way flights from San Antonio to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 1h 16m.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated January 30, 2026.
Read through reviews of airlines operating flights from San Antonio to Ontario, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Related info for your journey
Find useful and relevant information for your journey from San Antonio to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for San Antonio to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from San Antonio to Ontario
Discover the top 5 airlines that operate flights from San Antonio to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$110 | Average$256 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$115 | Average$220 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$264 | Average$378 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$295 | Average$388 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$301 | Average$446 | FlexibilityNo cancel fee | On-time69% |