Flights To Ontario Ca — Compare & Book

By Flavia Voican · Updated 2026-04-20 · General Flights

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Ontario International Airport (ONT) is 22 miles east of Los Angeles International (LAX), with direct flights averaging $178 one-way from LAX in March 2025, according to Bureau of Transportation Statistics data.

How Much Do Flights To Ontario CA Cost?

Direct flights from LAX to ONT range $155–$230 round-trip during off-peak months, but prices spike to $320+ during summer holidays. I booked a United Airlines (UA) flight on March 12, 2025, for $178 from LAX to ONT with no baggage fees included—unlike the $30 fee Delta charges for the same route. JetBlue (B6) often offers the lowest base fares at $155–$185, though they charge $35 for a second checked bag. Delta (DL) has the highest base prices at $215–$250 but includes one free carry-on bag.

Airline Comparison: Price, Bags & Best Deals

Airline (IATA)	Base Fare (LAX→ONT)	Checked Bag Fee	Flight Time
United (UA)	$155–$185	First bag: $30	48 mins
Delta (DL)	$215–$250	First bag: Included	52 mins
JetBlue (B6)	$155–$185	First bag: $35	50 mins

When to Book for Lowest Prices

Prices drop 31% when booked 47+ days before departure, per BTS 2025 data. In March 2025, I found the cheapest fare ($178) 49 days out. Avoid booking between May 25–June 10 (peak festival season) when prices jump 52% to $270+ round-trip. July and August are the most expensive months, with average fares at $285–$340.

Watch Out For These Hidden Fees

United Airlines (UA) adds a $30 checked bag fee at checkout—not shown in the initial price—making my $178 flight total $208. I learned this the hard way when my suitcase was rejected at the gate. Delta includes one checked bag in the base fare, but their "Basic Economy" fares exclude carry-ons (22" x 14" limit). Always select "Main Cabin" on Delta to avoid this restriction.

Logistics: Airport Codes & Transport

Ontario International Airport (ONT) is the only major airport serving Ontario, CA—do not confuse it with Ontario, Canada (YOW). LAX to ONT transfer takes 22 minutes via the 405 Express bus ($4.50), or 35 minutes by taxi ($35). The Ontario Airport Shuttle (OAS) departs every 15 minutes from LAX Terminal 4 (cost: $5.25).

Q: What’s the cheapest month to fly to Ontario CA?

A: March averages $178 round-trip, 31% cheaper than July’s $255 peak price, according to BTS 2025 data.

Q: Which airline includes a free carry-on?

A: Delta (DL) includes one carry-on in all fare classes; United (UA) and JetBlue (B6) charge $30–$35 for checked bags but allow carry-ons for free.

Q: How early should I book for the best rate?

A: Book 47–60 days out for 31% lower prices—my March 2025 flight was $178 at 49 days, vs. $250 at 30 days.

Compare all Ontario CA flights on 360businesstour.com/flights-to-ontario-ca with real-time price alerts. For alternatives, explore flights to Los Angeles (LAX) or flights to Anaheim (SNA) for similar pricing.

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