ONT - ATL

$53 Find Cheap Flights from Ontario to Atlanta

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Atlanta departing on 3/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Atlanta

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Atlanta.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Atlanta.
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Everything you should know

Cheapest round-trip
$203
Overall average: $409
Frontier
ndz. 3/1wt. 3/3
ONT - ATL • 1 stop
Cheapest non-stop
$398
Typical prices: $419-$921
Delta
sob. 3/7sob. 3/14
ONT - ATL • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
ONT provides a stress-free departure with easy parking.
Use MARTA rail for a smooth arrival at ATL.
Expert advice
Expert advice
Expert advice
Expert advice
Video guide: How to find cheap flights to Atlanta
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When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 45% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
April
Cheapest • 13% price drop
May
Most popular
Good to know
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+1
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Flight Deals
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Flight Deals

Cheap Flights from Ontario to Atlanta (ONT-ATL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Atlanta that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Atlanta

ndz., mar 1 - wt., mar 3
Frontier Logo
2:08 pm - 6:15 am
ONT
-
ATL
13h 07m
1 stop
Frontier Logo
9:09 pm - 1:11 pm
ATL
-
ONT
19h 02m
1 stop
$203Frontier
śr., lut 25 - ndz., mar 1
Frontier Logo
7:17 pm - 7:03 am
ONT
-
ATL
8h 46m
1 stop
Frontier Logo
8:50 pm - 1:11 pm
ATL
-
ONT
19h 21m
1 stop
$210Frontier
sob., lut 14 - czw., lut 26
Frontier Logo
8:09 pm - 5:04 am
ONT
-
ATL
5h 55m
1 stop
Frontier Logo
7:45 am - 2:29 pm
ATL
-
ONT
9h 44m
1 stop
$211Frontier
wt., mar 10 - czw., mar 12
Frontier Logo
6:15 am - 6:09 pm
ONT
-
ATL
8h 54m
1 stop
Frontier Logo
6:00 am - 3:55 pm
ATL
-
ONT
12h 55m
1 stop
$213Frontier
wt., lut 24 - ndz., mar 1
Frontier Logo
3:22 pm - 7:02 am
ONT
-
ATL
12h 40m
1 stop
Frontier Logo
8:50 pm - 1:11 pm
ATL
-
ONT
19h 21m
1 stop
$215Frontier
wt., lut 24 - ndz., mar 1
Frontier Logo
8:35 am - 6:15 am
ONT
-
ATL
18h 40m
1 stop
Frontier Logo
8:50 pm - 1:11 pm
ATL
-
ONT
19h 21m
1 stop
$216Frontier
czw., mar 5 - pon., mar 9
Frontier Logo
6:05 am - 7:18 pm
ONT
-
ATL
10h 13m
1 stop
Frontier Logo
9:20 pm - 11:59 pm
ATL
-
ONT
29h 39m
1 stop
$217Frontier
sob., lut 28 - sob., mar 7
Frontier Logo
6:00 am - 5:25 am
ONT
-
ATL
20h 25m
1 stop
Frontier Logo
6:40 am - 11:59 pm
ATL
-
ONT
20h 19m
2 stops
$218Frontier
czw., mar 19 - pon., mar 23
Frontier Logo
6:15 am - 5:01 am
ONT
-
ATL
19h 46m
1 stop
Frontier Logo
9:20 pm - 11:59 pm
ATL
-
ONT
29h 39m
1 stop
$219Frontier
pon., kwi 6 - czw., kwi 9
Multiple Airlines Logo
6:20 am - 11:29 pm
ONT
-
ATL
38h 09m
2 stops
Multiple Airlines Logo
9:21 pm - 11:56 pm
ATL
-
ONT
29h 35m
1 stop
$222Multiple Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Atlanta flights

Get data-powered insights and trends into flights from Ontario to Atlanta to help you find the cheapest flights, the best time to fly and much more.

Find cheap flights to Atlanta
Find cheap flights to Atlanta

Planning a trip from Ontario to Atlanta? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

What’s the cheapest day of the week to fly from Ontario to Atlanta?

The average price of all round-trip flights from Ontario to Atlanta clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Ontario to Atlanta, look for departures on Saturdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Atlanta, Tuesday is the cheapest day to fly and Monday is the most expensive.

What is the cheapest month to fly from Ontario to Atlanta?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Atlanta, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Atlanta is April, where tickets cost $360 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is $464 and $458 respectively.

Can I save money by flying with a layover from Ontario to Atlanta?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $399 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Atlanta, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Atlanta, you should book around 2 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 2 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to Atlanta

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Blane Bachelor

Blane Bachelor

Expert on ATL

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Good to know

Low seasonJanuary
Cheapest flight$53
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Ontario to Atlanta

When to book flights from Ontario to Atlanta

Are your dates flexible? Find out the best times to travel from Ontario to Atlanta based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Atlanta

  • Where do I park my car at Ontario Airport?

    There are several types of parking lots at Ontario International Airport, each with a different price range. These parking lots, including one on Terminal 1 that includes a cell phone lot and is accessible from the west of Airport Drive. Parking Lot D is located at the International Arrivals Terminal. Parking Lots 2 and 3 are located at Terminals 2 and 4, respectively. Parking Lot 5 is located close to the rental vehicle facility on Terminal Way's eastern side. The airport shuttle service is available in Lot 5.

  • Where can I have a meal at Ontario Airport?

    The Ontario Airport (ONT) offers a choice of culinary alternatives if you wish to have a snack before your trip. Wolfgang Puck Pizza and Harvest & Grounds are located at Terminal 2. Additionally, the restaurants in Terminal 4 are Coffee Bean & Tea Leaf, Einstein Bros. Bagels, and Rock & Brews.

  • Where are the nursing stations located at the Atlanta Airport?

    Airport lactation pods provide nursing mothers traveling through Hartsfield-Jackson Atlanta International Airport with intimate and private areas to care for their babies. The suites have benches, breast pump sockets, and diaper-changing tables. After security has arrived, they can be found in the arrivals area to the west of the domestic terminal.

  • Can I rent a car at Hartsfield-Jackson Atlanta International Airport?

    The Rental Car Center, a separate building on the airport property, handles on-site car rental pickups and returns. The Rental Car Center is easily reachable via the Atlanta SkyTrain. The Rental Car Center is served by various agencies including Advantage, Alamo, Avis, Budget, National, Dollar, Enterprise, Hertz, SIXT, Payless, and Thrifty.

  • What is the cheapest flight from Ontario to Atlanta?

    In the last 3 days, the lowest price for a flight from Ontario to Atlanta was $53 for a one-way ticket and $203 for a round-trip.

  • Do I need a passport to fly between Ontario and Atlanta?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airlines offer Wi-Fi service onboard planes from Ontario to Atlanta?

    All the following airlines offer inflight Wi-Fi service on the Ontario to Atlanta flight route: Delta, Alaska Airlines, JetBlue, American Airlines, Lufthansa, Hawaiian Airlines, and Iberia.

  • Which aircraft models fly most regularly from Ontario to Atlanta?

    The Airbus A321-100/200 is the aircraft model that flies most regularly on the Ontario to Atlanta flight route.

  • Which airline alliances offer flights from Ontario to Atlanta?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Ontario and Atlanta, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Ontario to Atlanta?

    There are nonstop flights from Ontario to Atlanta on a daily basis.

  • Which is the best airline for flights from Ontario to Atlanta, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Ontario to Atlanta are Southwest and Delta. With an average price for the route of $416 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $512 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Ontario to Atlanta?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Atlanta.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Atlanta?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Atlanta from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Atlanta?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Atlanta with an airline and back to Ontario with another airline. Booking your flights between Ontario and ATL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Atlanta?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Atlanta from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Ontario to Atlanta

  • Looking for a cheap flight? 25% of our users found flights on this route for $218 or less one-way and $341 or less round-trip.
  • Traveler Aid, which is a non-profit group, helps passengers who are stranded at Ontario International Airport (ONT). Volunteers help travelers with everything from general questions about the airport to finding lost items. They are found in Terminals 2 and 4 between the baggage claim and the escalator.
  • There are shuttles that travel between ONT Parking Lot 5, the ConRAC building, and the airport terminals. These shuttles run at least every 20 minutes between the hours of 12 am and 3 am, and as frequently as every 5 minutes during busy hours.
  • Travelers arriving at Hartsfield-Jackson Atlanta International Airport (ATL) can stroll by the rotating exhibits of photographs, paintings, and sculptures, in addition to the permanent artwork on display. Concerts by musicians are also held in the Atrium.
  • Pet relief areas are located in each concourse of the Atlanta Airport next to Gates T7, A10, C19, E14, F7, and the D-Midpoint. A pet relief area is available in the International Terminal arrivals area, while the South Ground Transportation section has a 1,000-square-foot dog park outside doors W1 and W2.
  • At the Atlanta Airport, there are prayer rooms and a multifaith chapel that offers Catholic, Christian, and Muslim services. The Concourse E Chapel is located behind the Martin King Jr. Exhibit, and theConcourse F Chapel is at the International Atrium on level 2, Domestic Terminal Chapel, landside.

Prefer to fly direct from Ontario to Atlanta?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Ontario to Atlanta Hartsfield-Jackson.
Find which airlines fly direct from Ontario Airport to Atlanta Hartsfield-Jackson Airport, which days they fly and book direct flights.

Direct departures

Ontario to Atlanta Hartsfield-Jackson

Monday

Delta

Delta

Tuesday

Delta

Delta

Wednesday

Delta

Delta

Thursday

Delta

Delta

Friday

Delta

Delta

Saturday

Delta

Delta

Sunday

Delta

Delta

See more direct flights

Direct returns

Atlanta Hartsfield-Jackson to Ontario

Monday

Delta

Delta

Tuesday

Delta

Delta

Wednesday

Delta

Delta

Thursday

Delta

Delta

Friday

Delta

Delta

Saturday

Delta

Delta

Sunday

Delta

Delta

See more direct flights

Reviews of the top 5 airlines serving from Ontario to Atlanta

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Atlanta. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Atlanta? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4273 reviews
7.5Entertainment
7.0Food
8.0Comfort
8.6Crew
8.1Boarding
Airline reviews

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

8.0 ExcellentJoseph, Jan 2026
LGB - PHX
Read more Southwest reviews

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

Great flight but super high price. Glad it was a business trip and not personal

3 hour delay. Had to change plans and was still delayed.

We got exit row seats both flights. Everything was running on time

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Timing, quality of service, promptness and courtesy of the staff

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

Connection through Atlanta was difficult. Mechanical issue on plane caused a two hour delay. New gate was a mile away.

No WiFi. Comfort plus should have alcohol provided, crew only offered water or tea. Who the heck wants tea?

There was no wifi available on this flight. And there were no screens, no onboard entertainment, no entertainment options at all. It was like travelling in the 1990s again, except without even a main screen for options. Seats, as usual, were tight and uncomfortable.

Good seat comfort ORF to ATL. Bad seat ATL to SEA (terrible lumbar support, hard, ouch)..

No in flight service, no explanation - FC got service, C+ did not, unsure about Economy. No turbulence to speak of, so I guess another way to cut cost, or promote health and well being of Delta employees? Also, boarding in MEM combined zones, and with overhead space already full on both flights after Zone 2/ Diamond, presents a huge challenge to find a space for a bag. Delta, other than point A to B, is no longer reasonable to fly - very poor experiences, not even taking into account the chastising at the gate and rude crews, across the board.

It would have been better if the flight wasn't delayed by 2.5 hours

It would be nice to have some low carb options in the snacks.

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

The flight was on time and arrived early. The crew were friendly and helpful.

Overall experience was great. Flights were almost on time in departing and we arrived at our destination as scheduled. No issues with amenities or flight crew. Everything went well as as expected. Will fly again with American Airlines in the future!

We never made it due to delays on both ends. Gate attendant said it was mechanical but the system said otherwise, so no compensation. That’s not right.

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

The flight was flawless and we even arrived between 20 and 25 minutes early!

The only thing to like was that we eventually got to our destination

For the price of the fare, there really isn’t much to complain about.

It was delayed but the landing was the smoothest in a while that I’ve had.

A Spirit agent caused me to miss my flight. The company has not responded for request of refund. Stay away from Spirit.

I arrived two hours early, and at 9:20 I was still queuing for security.

Got to LAX at 3:20 am, the counter personnel did not start to check in bags till 3:40 am. I patiently waited at the priority check in line as they started to take people from the general line. After about 15 minutes of waiting, I approached the lady exactly in front of the priority line and asked her if they would be taking people from the priority line or if I would need to switch to waiting in the general line. She responded “yes”, I then asked her yes to what? And she yelled back at me loudly “I SAID YES!” Needless to say, I waited at the end of the line of the general line. I could have been told the priority line would not be called upon and could have queued in the general line ahead of many people that arrived to cue after I did

Boarding was good, clearly explained and efficient. Staff were helpful, I would've liked a place to get coffee that wasn't Starbucks

See my last comment for the first leg. That should’ve been in here

This was my first time on a budget airline and I couldn't even sit down all the way because my knees would embed in the seat in front of me. I'm only 6' tall with a 32" inseam. There's no upside other than y'all are cheap. I'm glad it was only a 2 hour flight. Lesson learned! I get why everybody talks down on budget airlines. The staff was outstanding, the flight went as well as possible, great pilot, great boarding, smooth sailing. Zero chance I'll be back though.

Crew are always very angry and dismissive like they seem they are being forced to work. In addition, there was a long line for the bathrooms, and only one was allowed to be used. No reason was given for only one bathroom being available; apparently, the stewardess was more interested in using the jumpseat instead of allowing the customers to use the bathroom.

It was better than expected. But there were two delays in taking off.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

The third party booking with cheapflightsfares was awful. Kayak should NOT partner with them. They sold me a bundle including seat selection and carry-on, but did not book the carry-ons with Frontier, so I’m out of pocket for $414 more while I await resolution.

I loved the staff on the plane. So friendly and helpful! However, there was an argument and misunderstanding by the staff and a customer at the gate, and the staff member was being unprofessional. When we arrived in Atlanta, we waited 1.5 hrs for our luggage to arrive. When I asked the airport attendant, they said Frontier had the longest wait for luggage out of any airlines, and that they could not be held responsible for the delay.

Delayed. Text notifications were slow. Not much information o what was happening. Boarding was slow and confusing. Wasn’t even offered water other flight. Had to ask. No entertainment at all. Felt like.a Greyhound bus.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

There was no one at the counter to assist with our check in. The app didn’t work, so I arrived at the airport with time to check in and I couldn’t because no employees were there. When I finally got someone on the phone, it was inside the 60min rule and they said I could no longer check in and they could sell me another ticket. We had to scramble and pay an additional $800 for tickets and THEN AFTER (about 60 min from my original convo with customer service and 10min after original departure time) I had boarded my new flight, there was email saying my original flight from Frontier was delayed and leaving 2hr 50min later, but I STILL wouldn’t have been able to check in. Which means customer service should have been able to see it and let me check in because I was well within my check in time. When I call Frontier, they hang up on me. So their app didn’t work and they employees left and they take zero responsibility or assistance with their “customer service”

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

Everything you need to know for your flight from Ontario to Atlanta

Information on your arrival and departure airports