Cheap flights from Ontario to Key West from $298
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Key West departing on 5/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Ontario to Key West
Cheap round-trip flights
Cheap one-way flights
American Airlines flights from Ontario to Key West
Our best American Airlines deals on Ontario to Key West flight tickets
United Airlines flights from Ontario to Key West
Our best United Airlines deals on Ontario to Key West flight tickets
See travel insights to Key West from
How to get the cheapest flight ticket from Ontario to Key West
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Key West?
In general, September is the cheapest month to fly from Ontario to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $338. If you are unable to visit Key West during the month of September, then departing from Ontario during the month August is also very affordable. Most momondo users find prices during this month for around $398.
What is the cheapest day to depart on your flight to Key West?
On average, the least expensive day to fly to Key West from Ontario is on a Saturday. momondo users have found tickets for Saturday departures for as low as $447. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Key West for around $597.
What is the cheapest airline that flies from Ontario to Key West?
United Airlines and American Airlines are the most popular carriers operating from Ontario to Key West
What airlines fly to Key West?
American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Key West from Ontario according to our data. American Airlines is the first choice among our users, with 81% of people opting to fly with this airline when traveling to Key West. Keep in mind that there are 3 different airlines that fly to Key West on a routine basis, so you have a few additional options to choose from.
When to book flights from Ontario to Key West
Cheap Ontario to Key West (ONT to EYW) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Key West
How far is Ontario to Key West by plane?
The straight-line distance from Ontario to Key West is 2243.1 mi. Typically, this will take 7h 08m by plane in normal conditions.
When did momondo last update prices for flights from Ontario Airport to Key West Airport?
Prices for flights from Ontario Airport to Key West Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Key West Airport?
As of February 2025, there are 2 operators available to choose from for flights from Ontario Airport to Key West Airport.
How old do you have to be to fly from Ontario Airport to Key West Airport?
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 from Ontario Airport to Key West Airport.
What documentation or ID do you need to fly to Key West Airport?
The travel and health documents required for your trip to Key West Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Key West Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Ontario to Key West?
momondo data reveals that the most frequently booked airline on the route from Ontario to Key West is American Airlines, representing 74% of all bookings. The subsequent popular airline is Delta at 26%.
Best airlines flying from Ontario to Key West
Compare and see reviews for airlines that fly from Ontario to Key West with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $308 | Free Cancellation | Rating 8.0 8,220 reviews | |||
| PriceFrom $393 | Free Cancellation | Rating 7.2 10,000 reviews |
Traveling to a place near Key West?
Book flights to Key West if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ontario to Key West?
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 Key West from Ontario.
Can I find flights from Ontario to Key West with flexible booking policies on momondo?
All flight searches from Ontario to Key West on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Ontario to Key West?
Once all potential Ontario to Key West flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Ontario to Key West right now. Can momondo alert me if prices change?
Price alerts on flights to Key West from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.