Cheap flights To Adelanto (ONT) from $80

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Cheap Flights to Adelanto from $80 One Way, $129 Round Trip

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Tue, Apr 21 - Tue, Apr 28
SEA
Seattle - Tacoma Intl.
ONT
Los Angeles - Ontario Intl.
$129 Roundtrip, found 3 days ago
$129
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Apr 21 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Apr 28, priced at $129 found 3 days ago
Thu, May 7 - Mon, May 11
SEA
Seattle - Tacoma Intl.
ONT
Los Angeles - Ontario Intl.
$139 Roundtrip, found 1 day ago
$139
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, May 7 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Mon, May 11, priced at $139 found 1 day ago
Wed, Apr 22 - Sat, Apr 25
SEA
Seattle - Tacoma Intl.
ONT
Los Angeles - Ontario Intl.
$142 Roundtrip, found 4 days ago
$142
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Apr 22 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Sat, Apr 25, priced at $142 found 4 days ago
Wed, Apr 29 - Tue, May 5
DFW
Dallas-Fort Worth Intl.
ONT
Los Angeles - Ontario Intl.
$144 Roundtrip, found 5 days ago
$144
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Wed, Apr 29 from Dallas-Fort Worth Intl. to Los Angeles - Ontario Intl., returning Tue, May 5, priced at $144 found 5 days ago
Wed, Apr 29 - Wed, May 6
SEA
Seattle - Tacoma Intl.
ONT
Los Angeles - Ontario Intl.
$148 Roundtrip, just found
$148
Roundtrip
just found
Select Delta flight, departing Wed, Apr 29 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Wed, May 6, priced at $148 just found
Sat, May 16 - Thu, May 21
SEA
Seattle - Tacoma Intl.
ONT
Los Angeles - Ontario Intl.
$152 Roundtrip, found 4 days ago
$152
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, May 16 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Thu, May 21, priced at $152 found 4 days ago
Thu, Apr 30 - Mon, May 4
SEA
Seattle - Tacoma Intl.
ONT
Los Angeles - Ontario Intl.
$159 Roundtrip, found 13 hours ago
$159
Roundtrip
found 13 hours ago
Select Southwest Airlines flight, departing Thu, Apr 30 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Mon, May 4, priced at $159 found 13 hours ago
Sun, Apr 26 - Wed, Apr 29
ORD
O'Hare Intl.
ONT
Los Angeles - Ontario Intl.
$190 Roundtrip, found 6 days ago
$190
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Sun, Apr 26 from O'Hare Intl. to Los Angeles - Ontario Intl., returning Wed, Apr 29, priced at $190 found 6 days ago
Tue, Apr 28 - Tue, May 5
SEA
Seattle - Tacoma Intl.
ONT
Los Angeles - Ontario Intl.
$208 Roundtrip, just found
$208
Roundtrip
just found
Select United flight, departing Tue, Apr 28 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, May 5, priced at $208 just found
Mon, Apr 6 - Tue, Apr 7
ORD
O'Hare Intl.
ONT
Los Angeles - Ontario Intl.
$337 Roundtrip, just found
$337
Roundtrip
just found
Select American Airlines flight, departing Mon, Apr 6 from O'Hare Intl. to Los Angeles - Ontario Intl., returning Tue, Apr 7, priced at $337 just found

Adelanto Flight Information

Traveling To
Adelanto
Destination Airport IATA Code
ONT
Number of Airlines Serving
Airlines
Southwest Airlines, Alaska Airlines, Delta, Frontier Airlines, United, American Airlines
Flight Price
$129
Earliest Departing Flight
Latest Departing Flight

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Adelanto economy flight packages

Price found within the past 48 hours. Click for updated prices.
WorldMark Big Bear Lake
3.0-star property

WorldMark Big Bear Lake

Apr 16 - Apr 19

3 night stay

Seattle (SEA) to Ontario (ONT)

Frontier Airlines • Roundtrip • Coach
Price was $536, price is now $440 per person
$440
per person
found 1 day ago
N+P Boutique Lodge
4.0-star property

N+P Boutique Lodge

Apr 16 - Apr 19

3 night stay

Seattle (SEA) to Ontario (ONT)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $1,512, price is now $1,149 per person
$1,149
per person
found 1 day ago
Bluegreen Vacations Big Bear Village, an Ascend Collection Resort
4.0-star property

Bluegreen Vacations Big Bear Village, an Ascend Collection Resort

Apr 16 - Apr 19

3 night stay

Seattle (SEA) to Ontario (ONT)

Frontier Airlines • Roundtrip • Coach
Price was $664, price is now $522 per person
$522
per person
found 1 day ago
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Adelanto premium economy flight packages

Price found within the past 48 hours. Click for updated prices.
Hotel Seville
2.0-star property

Hotel Seville

9/10 Wonderful! (1,299 reviews)

May 5 - May 9

4 night stay

New York (NYC) to Ontario (ONT)

Delta • Non-stop • PremiumEconomy

Ontario (ONT) to New York (NYC)

JetBlue Airways • Non-stop • PremiumEconomy
Price was $900, price is now $823 per person
$823
per person
found 14 hours ago
Clean,Safe, comfortable

Reviewed on Feb 16, 2026

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Adelanto

If you are looking for affordable flights to Adelanto, look no further. Orbitz offers discounted rates to many destinations.

Bargain flights to Adelanto now available

As you review your budget and travel plans, consider the low fares Orbitz offers on Adelanto flights. With Orbitz, booking flights to Adelanto is easy and the lowest prices are guaranteed.

Easy self-help service offered

Orbitz offers cutting edge mobile tools that allow you to review and make bookings from your Android or iPhone mobile device with a simple application. You can easily and conveniently update your information or book your trip using this service. You are also able to obtain information on affordable hotel packages and receive frequent flight updates. You will receive confirmation of bookings or reservations made using the mobile service on the same day of the request. Change details or receive updates on your Adelanto flights by visiting the Orbitz site or mobile application.

Orbitz looks after you

Orbitz ensures that you are kept informed with up-to-date flight information, providing feedback to up to six contact numbers to ensure that everyone receives the feedback. In addition to providing the discounted deals on Adelanto flights, Orbitz is also able to structure a package based on your needs for activities, car hire and accommodations.

Traveler profile updates

After booking your Adelanto flights, you may access your account profile on the Orbitz site and update your frequent flyer or loyalty membership details. This information will remain on the system and will be available for you to access when you make any future bookings with Orbitz.

Frequently asked questions

Which airlines fly to Adelanto?
You can select from 20 airlines that fly in and out of Los Angeles - Ontario Intl. Airport (ONT), the main airport in the city. With plenty of options, you're sure to walk away with an incredible deal. Here are some of the major international airlines that'll get you to Adelanto:

  • Volaris - 9 flights to Adelanto per month
  • China Airlines - 3 flights to Adelanto per month
  • Avianca - 3 flights to Adelanto per month

How much is a flight to Adelanto?
Lots of terrific deals were there for the taking this week, with return flights to Adelanto ranging from $129 to $337. But it was passengers flying in from Seattle (SEA) who scored the biggest bargains. One-way tickets to Adelanto started at a low $80.
How to book the cheapest flight to Adelanto?
With some of the most impressive flight deals around, bagging a bargain is easy with Orbitz. The following handy hints will help you snap up cheap flights to Adelanto — and leave you with more money in your pocket:

  • Departing from or arriving at other airports can work out cheaper. Enter your preferred departure and arrival airports. Next, select the 'Nearby airports' function below to compare your options.
  • If you're flexible with your travel plans, click on the 'Show flexible dates' option. It'll bring up flight deals for the days around your chosen departure. Fares often vary depending on what day of the week it is.
  • You can also select the 'Show options' function to filter results for your preferred airline, seating class, nonstop flights and refundable flights. Under 'Sort & Filter' to the left, you can even choose the time of day you'd prefer to fly.
  • Reserve your seat as soon as you've figured out your travel dates. While it does happen from time to time, flights rarely get more affordable as your date of departure nears.
  • Consider combining your hotels, flights and car rentals into one convenient package deal to stretch your budget even further.
  • If practical, avoid flying in the most popular seasons. Airfares significantly increase during summer, school breaks and other vacation periods like Thanksgiving and Christmas.

What is the best time to book a flight to Adelanto?
Pick up a bargain and secure your seats to Adelanto in January. If you've missed this month, fear not. February and August often have affordable airfares as well. Just be careful you don't sleep on a sale — cheap flights emerge and disappear in a flash!
What day of the week is the cheapest to book a flight to Adelanto?
Make a booking on a Tuesday, Wednesday or Saturday. Typically, these are the cheapest days of the week to purchase fares to Adelanto. The vacation of your dreams starts with an incredible flight deal!
What is the cheapest day of the week to fly to Adelanto?
You can pick up cheap flights to Adelanto by flying out on a Monday, according to Orbitz data from 2020. Tuesday is the next most affordable day, while Saturday has the most costly ticket prices. Whether you prefer to save money or start your trip whenever is convenient, you'll always find a rewarding deal with Orbitz.
What is the cheapest month to fly to Adelanto?
Get set to jet for less in August. This is generally an excellent month to take off if you want cheap flights to Adelanto, Orbitz data shows. The least affordable time to fly is June, so avoid this month if possible.
Which airlines allow free cancellation?
If you're concerned your travel plans could change, Orbitz can help you find a flexible fare. All you need to do is choose "Filter by flexible change policies" when searching for your Adelanto flights. We'll show you all the airlines that offer free cancellation and no change fees — all on top of irresistibly low prices.
What do I need for the flight to Adelanto?
The trick to a comfortable and successful flight is being well prepared. Listed below are a few tips to help you get ready for your adventure:

  • Whether you print it out or use an electronic one, you'll need your boarding pass to step foot on the plane. You'll also need some kind of government-issued identification. If you're flying internationally, make sure your passport is valid and you've checked visa requirements.
  • To keep you entertained on the short hop to Adelanto, download some new tunes or stock up the podcast library on your tablet. Food can also be a nice distraction while in the air, so pack a snack.
  • It can get cold on the plane. If you don't like the idea of shivering your way through the flight, pack an extra layer.

How do I get cheap first-class/business deals to Adelanto?
Savvy travelers have a way of finding first or business-class flights to Adelanto that don't cost a packet. You can do the same with these helpful tips:

  • Flexibility isn't just a yoga thing. Have some room to move around your travel dates so you can pick up cheaper airfares when a huge sale drops.
  • Low-cost airlines offer business-class seating at a fraction of the normal price. Give the full-service carriers a miss and look into these cheaper options.
  • Bid for an upgrade in online auctions (if available) or upgrade your ticket with your frequent flyer points.

What is the best time to go to Adelanto?
Adelanto is popular in March, April and July. If you're contemplating visiting during these months, it would be a good idea to book ahead of time to ensure you land the greatest deals. Wondering what summertime's like in Adelanto? Average daily temperatures normally fluctuate between 65 ºF and 85 ºF. Like many destinations in the Northern Hemisphere, summertime commences June 20 here.

More to Explore

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.