Question 1

Why should I use momondo to find a flight deal to Ontario?

Accepted Answer

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario.

Question 2

Can I find flights to Ontario with flexible booking policies on momondo?

Accepted Answer

Yes. momondo allows you to filter the results for flights to Ontario to just show those with flexible booking policies.

Question 3

How can momondo help me find flights to Ontario?

Accepted Answer

momondo helps you find the best flight to Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select fights based on numerous factors such as price, departure and landing times, airport and airline.

Question 4

I’m not ready to book a flight to Ontario right now. Can momondo alert me if prices change?

Accepted Answer

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario and alert you when they change.

Question 5

How far in advance should I book a flight to Ontario?

Accepted Answer

Most flyers found that booking tickets 77 days in advance of their planned departure date is the best time to get cheap flights to Ontario. During this timeframe, flight prices are around £543. However, in the past 72 hours, people saw flights from United Kingdom for as low as £386.

Question 6

Is there an alternative airport near Ontario?

Accepted Answer

Ontario Airport, San Bernardino Int Airport, Santa Ana J. Wayne/Orange Cnty Airport, Long Beach Municipal Airport or Burbank Bob Hope Airport can be an alternative airport used for travel to Ontario.

Question 7

Is there a cheaper alternative to flying into Ontario?

Accepted Answer

The cheapest airport near Ontario is typically Santa Ana J. Wayne/Orange Cnty Airport, with an average price of £128/person. These prices vary based on where travellers are coming from. It is suggested that travellers looking to save money try momondo’s Airport-to-Airport Pricing Tool.

Question 8

What is the absolute cheapest flight to Ontario?

Accepted Answer

The best deal found on momondo in the last two weeks was a flight to Ontario from Las Vegas for £45. This is 73% cheaper than most flight deals to Ontario. To find the cheapest price to Ontario from your area, use momondo’s Airport-to-Airport Pricing Tool.

Question 9

Which airlines fly to Ontario?

Accepted Answer

There may be other airlines that fly to Ontario from United Kingdom, but the most popular among our users are British Airways, Virgin Atlantic, Lufthansa and KLM. These airlines should offer flights to Ontario on a routine basis if you’re flying from one of the more popular airports in United Kingdom.

Question 10

KLM Flights to Ontario

Accepted Answer

KLM is a popular choice for users travelling to Ontario. It operates 14 flights every week to Ontario, most often flying from Seattle/Tacoma Intl. KLM ticket prices will depend on when and where you need to fly from - deals as low as £390 (from London Heathrow) have been found by momondo users. In 1,384 reviews, momondo users have rated KLM at an average score of 7.8/10.

Question 11

United Airlines Flights to Ontario

Accepted Answer

United Airlines flights to Ontario can start from as low as £391 (round-trip, from London Heathrow, found in the last 72 hours). Over 19 flights that United Airlines operates to Ontario in a normal week, prices can vary significantly. The most popular United Airlines flight to Ontario is from Denver Intl. United Airlines has been rated 7.4/10 by momondo users, in 8,915 reviews.

Question 12

When did momondo last update prices for flights to Ontario Airport?

Accepted Answer

Prices for flights to Ontario Airport are updated daily.

Question 13

How many operators does momondo search for flights to Ontario Airport?

Accepted Answer

The number of operators available for flights to Ontario Airport is 6 as of August 2025.

Question 14

How old do you have to be to fly to Ontario Airport?

Accepted Answer

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel to Ontario Airport.

Question 15

What documentation or ID do you need to fly to Ontario Airport?

Accepted Answer

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Question 16

How far in advance should I book a flight to Ontario?

Accepted Answer

You are more likely to see cheaper flights to Ontario from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around £536 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from United Kingdom for as low as £424 on momondo.

Question 17

What is the cheapest month to fly to Ontario?

Accepted Answer

The month of February is, on average, the cheapest month to fly to Ontario from United Kingdom, with most prices found around £403. If you’re not able to fly to Ontario in February, then January is your next best option. Flight prices from United Kingdom to Ontario during January average around £412.

Question 18

What is the cheapest time of day to depart on your flight to Ontario?

Accepted Answer

Flying to Ontario from United Kingdom in the evening is the least expensive time of day to depart. momondo users have found prices as low as £474 when looking at flights departing in the evening. In contrast, the most expensive time of day to depart to Ontario is at midday when prices are around £557.

Question 19

What is the cheapest day to depart on your flight to Ontario?

Accepted Answer

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as £485. This is often the case because there is less demand to fly during this day of the week. Flights from United Kingdom to Ontario on a Sunday will generally be more expensive and average around £561. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Question 20

How long does it take to fly to Ontario?

Accepted Answer

On average, it takes 11h 05m to fly from United Kingdom to Ontario if you fly out of London Heathrow (the most popular airport in United Kingdom) and into Los Angeles (the most popular airport in Ontario). If you’re flying out of Manchester and into Los Angeles, then the flight time is around 14h 10m.

CHEAPEST MONTH TO FLY TO ONTARIO FROM LONDON HEATHROW AIRPORT	February	19% cheaper	Flying from London Heathrow Airport to Ontario costs on average just £434 in February
MOST EXPENSIVE MONTH TO FLY TO ONTARIO FROM LONDON HEATHROW AIRPORT	August	31% more expensive	It costs about £706 for flights to Ontario from London Heathrow Airport in August
MOST POPULAR MONTH TO FLY TO ONTARIO FROM LONDON HEATHROW AIRPORT	November	800% more users visited	More momondo users searched in flights to Ontario from London Heathrow Airport in November than any other month

Best One-Way Price	£310
Best Round-Trip Price	£406
Fastest flight time	14h 24m
Popular in	August

£310 Cheap flights to Ontario

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Ontario departing on 7/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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What is the cheapest month to fly to Ontario?

What is the cheapest day to depart on your flight to Ontario?

What is the cheapest time of day to depart on your flight to Ontario?

How far in advance should I book a flight to Ontario?

How long does it take to fly to Ontario?

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Summary info about Ontario flight prices, duration and airlines

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Frequently asked questions about flying to Ontario

How far in advance should I book a flight to Ontario?

Is there an alternative airport near Ontario?

Is there a cheaper alternative to flying into Ontario?

What is the absolute cheapest flight to Ontario?

When did momondo last update prices for flights to Ontario Airport?

How many operators does momondo search for flights to Ontario Airport?

How old do you have to be to fly to Ontario Airport?

What documentation or ID do you need to fly to Ontario Airport?

Why use momondo?

Why should I use momondo to find a flight deal to Ontario?

Can I find flights to Ontario with flexible booking policies on momondo?

How can momondo help me find flights to Ontario?

I’m not ready to book a flight to Ontario right now. Can momondo alert me if prices change?

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Popular Flights to Ontario

Popular routes according to searches in the past day on momondo