$96+ Cheap flights from San Antonio to Ontario (SAT - ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ONT
Oct 12 — Oct 191
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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
Cheapest
Best
Last-minute
One-way
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 September 12, 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 September 12, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 11/118:20 pm -
1 stop5h 31m
Sat 11/146:25 am -
1 stop11h 00m
Deal found 9/11![Frontier logo]()
$194
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:21 pm -
1 stop5h 29m
Tue 10/276:25 am -
1 stop11h 00m
Deal found 9/10![Frontier logo]()
$195
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 9/308:20 pm -
1 stop5h 27m
Tue 10/66:15 am -
1 stop11h 10m
Deal found 9/10![Frontier logo]()
$203
This Travelocity deal was found by Cheapflights users on 9/9. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:21 pm -
1 stop16h 08m
Tue 10/206:15 am -
1 stop11h 11m
Deal found 9/9![Frontier logo]()
$206
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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.
Mon 10/198:21 pm -
1 stop16h 08m
Wed 10/216:15 am -
1 stop11h 11m
Deal found 9/9![Frontier logo]()
$208
This Gotogate deal was found by Cheapflights users on 9/10. 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 10/38:20 pm -
1 stop5h 27m
Sat 10/106:15 am -
1 stop11h 11m
Deal found 9/10![Frontier logo]()
$212
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 10/288:20 pm -
1 stop5h 31m
Sat 11/1411:52 am -
1 stop5h 33m
Deal found 9/8![Frontier logo]()
$221
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/108:21 pm -
1 stop5h 29m
Wed 10/146:15 am -
1 stop11h 11m
Deal found 9/10![Frontier logo]()
$225
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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.
Mon 9/288:20 pm -
1 stop16h 10m
Wed 9/306:15 am -
1 stop11h 10m
Deal found 9/9![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 9/303:19 pm -
1 stop17h 45m
Mon 10/58:24 pm -
1 stop15h 56m
Deal found 9/10![Frontier logo]()
$228
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Mon 10/58:20 pm -
1 stop16h 10m
Sat 10/106:15 am -
1 stop11h 11m
Deal found 9/10![Frontier logo]()
$229
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 10/2910:29 pm -
1 stop14h 47m
Tue 11/36:25 am -
1 stop11h 00m
Deal found 9/9![Frontier logo]()
$235
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 September 12, 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 September 12, 2026.
This United Airlines deal was found by Cheapflights users on 9/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/192:15 pm -
2 stops8h 05m
Tue 1/266:00 am -
2 stops8h 30m
Deal found 9/8![United Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 9/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:00 pm -
1 stop7h 55m
Mon 11/25:03 pm -
1 stop5h 27m
Deal found 9/11![Delta logo]()
$451
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:55 pm -
2 stops7h 50m
Mon 10/266:10 am -
2 stops10h 05m
Deal found 9/9![Southwest logo]()
$467
This KAYAK deal was found by Cheapflights users on 9/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:00 pm -
1 stop5h 53m
Mon 10/1211:59 pm -
1 stop6h 41m
Deal found 9/11![American Airlines logo]()
$495
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/126:05 pm -
1 stop7h 43m
Tue 2/165:05 pm -
1 stop5h 40m
Deal found 9/7![Delta logo]()
$454
This United Airlines deal was found by Cheapflights users on 9/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1511:48 am -
2 stops10h 32m
Sun 1/35:00 am -
1 stop5h 48m
Deal found 9/7![United Airlines logo]()
$482
This Southwest deal was found by Cheapflights users on 9/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:05 am -
2 stops11h 20m
Sun 11/158:05 am -
2 stops7h 20m
Deal found 9/8![Southwest logo]()
$513
This KAYAK deal was found by Cheapflights users on 9/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:00 pm -
1 stop5h 53m
Wed 10/141:05 pm -
2 stops7h 52m
Deal found 9/11![American Airlines logo]()
$525
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:25 pm -
2 stops10h 26m
Sun 10/116:00 am -
1 stop7h 53m
Deal found 9/9![United Airlines logo]()
$501
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 pm -
1 stop7h 55m
Sun 10/116:00 am -
1 stop5h 40m
Deal found 9/9![Delta logo]()
$527
This United Airlines deal was found by Cheapflights users on 9/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/265:57 pm -
2 stops28h 54m
Thu 10/291:32 pm -
2 stops7h 19m
Deal found 9/7![United Airlines logo]()
$515
This United Airlines deal was found by Cheapflights users on 9/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:30 am -
3 stops14h 31m
Sun 11/16:00 am -
1 stop5h 16m
Deal found 9/8![United Airlines logo]()
$516
Last-minute flights from San Antonio to OntarioDiscover last-minute flight deals from San Antonio to Ontario. Data last updated September 12, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Ontario. Data last updated September 12, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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.
Mon 9/288:20 pm -
1 stop16h 10m
Wed 9/306:15 am -
1 stop11h 10m
Deal found 9/9![Frontier logo]()
$226
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 9/308:20 pm -
1 stop5h 27m
Tue 10/66:15 am -
1 stop11h 10m
Deal found 9/10![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 9/303:19 pm -
1 stop17h 45m
Mon 10/58:24 pm -
1 stop15h 56m
Deal found 9/10![Frontier logo]()
$228
This Gotogate deal was found by Cheapflights users on 9/10. 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 10/38:20 pm -
1 stop5h 27m
Sat 10/106:15 am -
1 stop11h 11m
Deal found 9/10![Frontier logo]()
$212
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Mon 10/58:20 pm -
1 stop16h 10m
Sat 10/106:15 am -
1 stop11h 11m
Deal found 9/10![Frontier logo]()
$229
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/108:21 pm -
1 stop5h 29m
Wed 10/146:15 am -
1 stop11h 11m
Deal found 9/10![Frontier logo]()
$225
This Travelocity deal was found by Cheapflights users on 9/9. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:21 pm -
1 stop16h 08m
Tue 10/206:15 am -
1 stop11h 11m
Deal found 9/9![Frontier logo]()
$206
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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.
Mon 10/198:21 pm -
1 stop16h 08m
Wed 10/216:15 am -
1 stop11h 11m
Deal found 9/9![Frontier logo]()
$208
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:21 pm -
1 stop5h 29m
Tue 10/276:25 am -
1 stop11h 00m
Deal found 9/10![Frontier logo]()
$195
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 10/228:21 pm -
1 stop5h 29m
Tue 11/36:25 am -
1 stop11h 00m
Deal found 9/8![Frontier logo]()
$239
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 10/288:20 pm -
1 stop5h 31m
Sat 11/1411:52 am -
1 stop5h 33m
Deal found 9/8![Frontier logo]()
$221
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 10/2910:29 pm -
1 stop14h 47m
Tue 11/36:25 am -
1 stop11h 00m
Deal found 9/9![Frontier logo]()
$235
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 September 12, 2026.
Search for one-way flight options from San Antonio to Ontario. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
This Super.com deal was found by Cheapflights users on 9/9. 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 10/38:20 pm -
1 stop5h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$96
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/218:21 pm -
1 stop5h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$98
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/208:21 pm -
1 stop5h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$99
This Super.com deal was found by Cheapflights users on 9/9. 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.
Wed 9/308:20 pm -
1 stop5h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$106
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/148:21 pm -
1 stop5h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$107
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/158:21 pm -
1 stop5h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$110
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 11/128:20 pm -
1 stop5h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$111
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/138:21 pm -
1 stop16h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$112
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Mon 10/268:21 pm -
1 stop16h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$115
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Mon 10/198:21 pm -
1 stop16h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$116
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 11/148:20 pm -
1 stop5h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$117
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 September 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $194 (Cheapflightsfares) |
One-way from | $96 (Super.com) |
Popular in | June |
Cheapest in | November |
Average price | $375 |
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 7,457,451 searches. Data last updated September 12, 2026.
Use the filters below to find and compare flights from San Antonio to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Tue 1/5
11:50 am-2:30 pm
1 stop4h 40m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$211
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Tue 12/29
7:57 pm-11:59 pm
1 stop6h 02m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$216
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Fri 10/16
3:55 pm-9:45 pm
2 stops7h 50m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$221
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Tue 12/22
4:43 pm-9:00 pm
1 stop6h 17m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$223
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Sat 10/17
1:12 pm-10:51 pm
2 stops11h 39m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$228
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Fri 12/25
7:45 am-12:22 pm
1 stop6h 37m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$240
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Sun 10/4
5:30 am-12:18 pm
2 stops8h 48m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$244
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Fri 1/1
4:41 pm-9:00 pm
1 stop6h 19m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$248
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Tue 2/16
8:55 am-12:33 pm
1 stop5h 38m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$261
San AntonioOntario
SAT San Antonio - ONT Ontario
SATONT
San Antonio
Sat 10/24
1:12 pm-10:51 pm
2 stops11h 39m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$266
Showing 1-10 of 24 resultsSorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star |
- 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
Prices
More
How far ahead should I book a flight from San Antonio to Ontario?
Booking 46 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, October is the cheapest month in which you can book a flight from San Antonio to Ontario (average of $296). Flying from San Antonio to Ontario in June is currently the most expensive (average of $416). 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.
How much does it cost to fly round-trip from San Antonio to Ontario?
Airfare is below average for this route at the moment.
San Antonio to Ontario flights typically cost between $326 and $591 in November.The cheapest round-trip price found within the last 5 days was $194 on Frontier (Nov 11-Nov 14).
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 $248.
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: 4h 52m.
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 10m.
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 September 12, 2026.
Read through reviews of airlines operating flights from San Antonio to Ontario, such as Southwest,American Airlines, andFrontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from San Antonio
Popular flights
Alternative routes for San Antonio to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Antonio to Ontario by cabin class
Find flights from San Antonio to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 12, 2026.
San Antonio and Ontario flights
Browse other San Antonio and Ontario flight options. Last updated on September 12, 2026.
Other flights from San Antonio
Browse through other flights departing from San Antonio. Flights are based on user searches made on Cheapflights and were last updated on September 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from San Antonio to Ontario
Discover the top 3 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 7,457,451 searches. Data last updated September 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$140 | Average$305 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$273 | Average$406 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$316 | Average$446 | FlexibilityNo cancel fee | On-time63% |