Ontario is in southwestern San Bernardino County, in the Inland Empire, 35 miles east of downtown Los Angeles. Ontario Mills is the largest outlet mall in California, Toyota Arena seats 11,000, and the city is a logistics hub for freight moving out of the Los Angeles and Long Beach ports. The airport, Ontario International, is two miles east of downtown Ontario and serves the Inland Empire and the east side of greater Los Angeles.
The airport’s route map doesn’t list a nonstop between Indianapolis and Ontario, and every itinerary Google Flights priced on October 14 connected once, most of them in Denver. Frontier had the cheapest fare at $193 round trip, for a week leaving November 7, for two days leaving November 4 and for three days leaving December 5, with a late-evening landing each time. Southwest through Denver, American through Dallas and Delta through Atlanta all sold at $377 on those dates. Los Angeles on the same November 7 to 14 dates was $232 on Frontier and $269 on the American nonstop, so Ontario was the cheaper way into the Los Angeles area that week.
Cheapest time to fly from Indianapolis to Ontario
On October 14, 2026 we priced every departure from November 2026 through April 2027 at every trip length from two days to two weeks; Google Flights hadn’t priced a May round trip on this route yet. November and December were the floor at $193, on more than twenty date pairs each, including two days leaving November 4, a week leaving November 7 and three days leaving December 5. January was $204 for three days leaving the 25th, February $238 for three days leaving the 22nd, March $352 for two days and April $488 for a week leaving the 7th. A typical date ran $298 in November, $323 in December, $351 to $377 in January and February, and $507 in March and April. On October 8 the calendar had shown a flat $248 on nearly every date from November through January, and on October 3 $339 for a week leaving November 3, so the $193 is a real drop.
| Departure month | Lowest round trip seen | Typical fare that month |
|---|---|---|
| November 2026 | $193 (Nov 4 to 6, 2 days) | $298 |
| December 2026 | $193 (Dec 5 to 8, 3 days) | $323 |
| January 2027 | $204 (Jan 25 to 28, 3 days) | $377 |
| February 2027 | $238 (Feb 22 to 25, 3 days) | $351 |
| March 2027 | $352 (Mar 1 to 3, 2 days) | $507 |
| April 2027 | $488 (Apr 7 to 14, 7 days) | $507 |
| May 2027 | No round trip priced yet | Not priced yet |
Airlines that fly Indianapolis to Ontario
This is what Google Flights showed on the dates we checked, not a schedule, so treat it as the shape of the route rather than a promise.
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Indianapolis to Ontario fare history
All of these fares were on Google Flights on an Indianapolis search on the day shown next to each one, and the times are for the quickest itinerary at each fare. The $193 trip leaving November 7 departs Indianapolis at 4:03 PM, lands in Denver at 5:00 PM, leaves again at 10:29 PM and lands in Ontario at 11:51 PM, and the flight home on the 14th leaves at 6:30 AM through Denver and lands in Indianapolis at 3:08 PM. The $193 trip leaving December 5 departs at 4:41 PM, connects in Denver and lands in Ontario at 10:17 PM, and the flight home leaves at 6:00 AM on the 8th, landing at 3:46 PM. The $204 trip leaving January 25 departs at 4:30 PM and lands in Ontario at 12:05 AM, and the flight home leaves at 6:30 AM on the 28th, landing at 3:35 PM.
Indianapolis to Ontario flight questions
Is there a nonstop from Indianapolis to Ontario? No. The airport’s route map doesn’t list one, and every fare we read connected once, most of them in Denver. Frontier’s $193 lands at 11:51 PM; Southwest through Denver at $377 has you on the ground by 10:10 AM.
How long is the flight? About six hours with a same-day connection: Southwest through Denver took 6 hours 15 minutes out and 6 hours 10 minutes back. Frontier’s $193 routing takes 10 hours 48 minutes out, most of that a five-and-a-half-hour layover in Denver, and 5 hours 38 minutes back.
What’s a good price? Under $250 round trip, which is where Frontier’s Denver connection sat from November through February, $193 to $238. The same-day connections on Southwest, American and Delta were $377 on every set of dates we read, so under $380 is the number for a trip with no late landing.
Is Los Angeles cheaper? Not on the dates we read. Los Angeles on November 7 to 14 was $232 on Frontier through Denver and $269 on the American nonstop, against $193 into Ontario. Ontario is 35 miles east of downtown Los Angeles, so it depends on which side of the city you’re headed to.
Which airport does this fare use? Indianapolis International, IND, out and Ontario International, ONT, in, two miles east of downtown Ontario in San Bernardino County. Every fare on this page is an Indianapolis search.
Do the cheap fares include a bag? The $193 is a Frontier fare: a personal item is included, and a carry-on or a checked bag is extra. Southwest, American and Delta each have their own bag rules on the $377 fares. Price the bag before you compare them.
If Ontario is the plan but the dates don’t fit, San Diego, Las Vegas and Denver are the other routes we track in the West from Indianapolis. All our North America routes are in the North America list.
Note: the fares above are historical and airfare prices change constantly. They may not include baggage fees, which vary by airline and ticket class. Always confirm the current price and any add-on fees directly with the airline before booking.