WarBird Flight is an independent booking service, not affiliated with United Airlines. Fares are recorded lows for the route across carriers; the agent quotes United Airlines's current fare on the call.

BOI → ONT · about 1h 58m · 661 miles · 4 airlines
Fares shown are recorded lows. An agent confirms today's live price on the call.
United Airlines serves BOI–ONT through its hub network, usually with one connection. The nonstop flight time is about 1h 58m.
Fare classes available: Basic Economy, Economy, Economy Plus, Premium Plus / First / Polaris. United has no change fees on Economy and above for travel within the US or between the US and Mexico, the Caribbean, or international destinations originating in the US. Fare difference applies.
The lowest one-way fare we have on record for this route is $229 on United. Fares like that usually show up on off-peak days and for travel booked a few weeks out; an agent can check whether a similar fare is available for your dates.
Because Delta Air Lines treats Ontario as a hub, this pairing tends to have frequent departures throughout the day. American Airlines and Southwest Airlines also compete here, which keeps fares in check.
The 661 miles between Boise and Ontario works out to about 1h 58m in the air, the range where nonstops are common on busy days and connections through a hub fill in the rest. Ask the agent to compare both; the one-stop is sometimes cheaper by a wide margin.
Lowest United Airlines fares seen in recent searches. Recorded lows, not live quotes.
West Coast and Mountain departures spike over summer holidays and the December break; January (after New Year), late April, May, and September are usually the cheapest windows.
Tuesday, Wednesday, and Saturday departures are usually the cheapest days on domestic routes; Friday and Sunday are the most expensive. Early-morning and late-evening flights are often priced below the midday departures.
For domestic travel, booking three to eight weeks ahead usually captures the best price. Inside two weeks, fares climb; more than four months out, airlines have not yet released their cheapest inventory.
Fares from a neighboring airport are sometimes far lower than the drive is long. Agents quote all of these on one call.
Licensed agents at our partner agency handle these by phone, 24/7. No charge for a quote.
United Airlines usually connects through one of its hubs on this route. The agent will compare nonstop options on other carriers.
The lowest one-way fare we have recorded recently is $229. Fares change daily; call (708) 866-8751 for today's price.
A nonstop flight takes about 1h 58m to cover 661 miles. Connecting itineraries add two to five hours depending on the layover.
Delta Air Lines, United Airlines, American Airlines, and Southwest Airlines are the carriers most likely to serve this route. We book all of them.
Yes. Licensed agents at our partner agency book United and United Express flights in every cabin and can compare them with other carriers on your route.
On most domestic routes, no. Only a personal item is included. Economy fares include a full-size carry-on.