DCA - DEN

$94 Find Cheap Flights from Reagan Washington National Airport to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Reagan-National to Denver departing on 4/28. 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 Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Denver, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$136
Overall average: $298
Frontier
Tue 4/7Wed 4/8
DCA - DEN • Non-stop
Cheapest one-way
$94
Typical prices: $127-$248
Frontier
Tue 4/28
DCA - DEN • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
DCA's metro line offers a quick 30-minute ride.
Use the RTD A line train for a budget-friendly ride.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
Every day
You can fly direct with Frontier and United Airlines. Average duration is 4h 15m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Frontier
Most punctual • 84% on-time
Morning flights
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 25% price drop
July
Most popular
Good to know
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+1
+1
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Denver!
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Flight Deals

Cheap Flights from Reagan-National to Denver (DCA-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Reagan-National to Denver 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 Reagan-National to Denver

Tue, Apr 7 - Wed, Apr 8
Frontier Logo
6:00 pm - 8:11 pm
DCA
-
DEN
4h 11mnonstop
Frontier Logo
4:36 pm - 9:59 pm
DEN
-
DCA
3h 23mnonstop
$136Frontier
Sun, May 3 - Tue, May 5
Frontier Logo
1:59 pm - 4:04 pm
DCA
-
DEN
4h 05mnonstop
Frontier Logo
4:36 pm - 9:59 pm
DEN
-
DCA
3h 23mnonstop
$138Frontier
Sun, Apr 26 - Wed, Apr 29
Frontier Logo
8:00 am - 10:12 am
DCA
-
DEN
4h 12mnonstop
Frontier Logo
4:36 pm - 9:59 pm
DEN
-
DCA
3h 23mnonstop
$141Frontier
Sun, Apr 12 - Fri, Apr 17
Frontier Logo
7:00 am - 9:07 am
DCA
-
DEN
4h 07mnonstop
Frontier Logo
4:36 pm - 9:59 pm
DEN
-
DCA
3h 23mnonstop
$143Frontier
Wed, Apr 8 - Sat, Apr 11
Frontier Logo
7:00 am - 9:07 am
DCA
-
DEN
4h 07mnonstop
Frontier Logo
6:40 am - 12:02 pm
DEN
-
DCA
3h 22mnonstop
$144Frontier
Wed, Apr 8 - Sun, Apr 12
Frontier Logo
7:00 am - 9:07 am
DCA
-
DEN
4h 07mnonstop
Frontier Logo
6:40 am - 12:02 pm
DEN
-
DCA
3h 22mnonstop
$145Frontier
Wed, Apr 22 - Wed, Apr 29
Frontier Logo
8:00 am - 10:12 am
DCA
-
DEN
4h 12mnonstop
Frontier Logo
11:34 am - 4:59 pm
DEN
-
DCA
3h 25mnonstop
$146Frontier
Tue, Apr 28 - Sat, May 2
Frontier Logo
8:00 am - 10:12 am
DCA
-
DEN
4h 12mnonstop
Frontier Logo
11:34 am - 4:59 pm
DEN
-
DCA
3h 25mnonstop
$147Frontier
Tue, Apr 7 - Sat, Apr 11
Frontier Logo
7:00 am - 9:07 am
DCA
-
DEN
4h 07mnonstop
Frontier Logo
6:40 am - 12:02 pm
DEN
-
DCA
3h 22mnonstop
$148Frontier
Tue, Apr 7 - Sun, Apr 12
Frontier Logo
7:00 am - 9:07 am
DCA
-
DEN
4h 07mnonstop
Frontier Logo
6:40 am - 12:02 pm
DEN
-
DCA
3h 22mnonstop
$149Frontier
Booking Insights

KAYAK's insights & trends for Reagan-National to Denver flights

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

What’s the cheapest day of the week to fly from Reagan Washington National Airport to Denver?

The average price of all round-trip flights from Washington, D.C. Reagan-National Airport to Denver clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Denver on a Saturday and more expensive on a Thursday. On your return trip to Reagan Washington National Airport, you should consider flying back on a Saturday, and avoid Sundays for better deals.

What is the cheapest month to fly from Washington, D.C. Reagan-National Airport to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Reagan-National Airport to Denver, 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 Washington, D.C. Reagan-National Airport to Denver is January, where tickets cost $201 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $355 and $326 respectively.

How far in advance should I book a flight from Washington, D.C. Reagan-National Airport to Denver?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Reagan-National Airport to Denver, 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 Washington, D.C. Reagan-National Airport to Denver, you should book around 2 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Expert advice

Expert advice for your flight from Reagan-National to Denver

 
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
Ramsey Qubein

Ramsey Qubein

Expert on DCA

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Harriet Baskas

Harriet Baskas

Expert on DEN

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Good to know

Low seasonNovember
Cheapest flight$94
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Reagan Washington National Airport to Denver

When to book flights from Reagan-National to Denver

Are your dates flexible? Find out the best times to travel from Reagan-National to Denver 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 Reagan Washington National Airport to Denver flights

  • Which airlines have lounges at Denver International Airport?

    American Airlines, United Airlines, and Delta have lounges at DEN. Passengers can access the AA and United lounges by showing their flight tickets and paying an entrance fee. The Delta lounge is only open to Elite status passengers. The American Airlines lounge is on Concourse A on the north end of the A Gates. Delta Sky Club is on the same concourse but in the Central Core. United Club has two locations at DEN: East and West Wings.

  • What are the transport options from Denver International Airport?

    DEN is served by cheap public transport, and the Denver RTD provides buses and trains from DEN to downtown. The commuter RTD Line A train provides frequent services from DEN, running every 15-30min depending on the passengers available, and the trip downtown takes around 40min. RTD also provides several buses from DEN, and they serve most of Denver’s hubs, departing every 15min from the airport. Taxis are available at the baggage claim area and offer a flute rate downtown. If you’re looking to self-drive, various rental car companies operate a shuttle from the Jeppesen Terminal, departing every 20min to their lots.

  • Does Ronald Reagan Washington National Airport offer accessible services?

    DCA is an accessible airport. The airport has provided wheelchair assistance for passengers with limited mobility, and they can access this service by booking through their airline. These passengers will also have accessible restrooms and water fountains, reserved parking spaces, fast-track services, and more at DCA. Aira services are free for low-vision passengers, while the airport has courtesy TDD phones for the deaf.

  • Does Ronald Reagan Washington National Airport have pet relief areas?

    DCA is a pet-friendly airport, and Fido is welcome to join in on your trip. The airport has provided pet relief areas to accommodate their furry guests. You’ll find these spots in Terminal A opposite Doors 1 and 5, Terminal B opposite the South Metrorail Station entrance, and Terminal C opposite the North Metrorail Station entrance.

  • What is the cheapest flight from Washington, D.C. Reagan-National Airport to Denver?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to Denver was $94 for a one-way ticket and $136 for a round-trip.

  • Do I need a passport to fly between Reagan Washington National Airport and Denver?

    No

  • Which airports will I be using when flying from Reagan Washington National Airport to Denver?

    Reagan Washington National Airport and Denver are both served by 1 main airport. You will leave Reagan Washington National Airport from Washington, D.C. Reagan-National and will be arriving at Denver Intl.

  • Which airlines offer Wi-Fi service onboard planes from Reagan Washington National Airport to Denver?

    Alaska Airlines, JetBlue, American Airlines, and Delta offer inflight Wi-Fi service on the Reagan Washington National Airport to Denver flight route.

  • Which aircraft models fly most regularly from Reagan Washington National Airport to Denver?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Reagan Washington National Airport to Denver flight route.

  • Which airline alliances offer flights from Reagan Washington National Airport to Denver?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Reagan Washington National Airport and Denver, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Reagan Washington National Airport to Denver?

    There are nonstop flights from Reagan Washington National Airport to Denver on a daily basis.

  • Which is the best airline for flights from Washington, D.C. to Denver, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Denver are Southwest and Delta. With an average price for the route of $357 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 $366 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Reagan Washington National Airport to Denver?

    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 Reagan Washington National Airport to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Reagan Washington National Airport to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Reagan Washington National Airport 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 Reagan Washington National Airport to Denver?

    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 Denver with an airline and back to Reagan Washington National Airport with another airline. Booking your flights between Reagan Washington National Airport and DEN 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 Reagan Washington National Airport to Denver?

    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 Denver from Reagan Washington National Airport 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 Washington, D.C. Reagan-National Airport to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for $113 or less one-way and $209 or less round-trip.
  • Denver International Airport (DEN) has an efficient hub and spoke layout, consisting of the main Jeppesen Terminal and three concourses. A walkway connects the main terminal to concourse A, but the airport also has an underground train providing inter-terminal transportation.
  • Book a stay at the Westin Hotel at Denver International Airport if you wish to catch some sleep or stay overnight at DEN. The establishment is within airport grounds, on the upper level of the Jeppesen Terminal.
  • About 670 kg of carbon is emitted on flights from Washington to Denver. However, you can get eco-friendlier flights from Frontier Airlines as they offer a flight that emits 47% less carbon per passenger on this route.
  • If you’re feeling a bit nervous before your flight, you’re welcome to relax with a massage from XpresSpa at Ronald Reagan Washington National Airport (DCA). XpresSpa offers various services, all taking less than 30min, and the establishment is in Terminal B landside in the National Hall.
  • There is an interfaith chapel at DCA on the south end of Concourse B. Clergy-led catholic mass and protestant worship are organized, and so are non-clergy-led Jewish and Muslim prayer times.

Prefer to fly direct from Reagan Washington National Airport to Denver?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Washington, D.C. Reagan-National to Denver Intl.
Find which airlines fly direct from Washington, D.C. Reagan-National Airport to Denver Intl Airport, which days they fly and book direct flights.

Direct departures

Washington, D.C. Reagan-National to Denver Intl

Monday

Frontier,United Airlines

Frontier,United Airlines

Tuesday

Frontier,United Airlines

Frontier,United Airlines

Wednesday

Frontier,United Airlines

Frontier,United Airlines

Thursday

Frontier,United Airlines

Frontier,United Airlines

Friday

Frontier,United Airlines

Frontier,United Airlines

Saturday

Frontier,United Airlines

Frontier,United Airlines

Sunday

Frontier,United Airlines

Frontier,United Airlines

See more direct flights

Direct returns

Denver Intl to Washington, D.C. Reagan-National

Monday

Frontier,United Airlines

Frontier,United Airlines

Tuesday

Frontier,United Airlines

Frontier,United Airlines

Wednesday

Frontier,United Airlines

Frontier,United Airlines

Thursday

Frontier,United Airlines

Frontier,United Airlines

Friday

Frontier,United Airlines

Frontier,United Airlines

Saturday

Frontier,United Airlines

Frontier,United Airlines

Sunday

Frontier,United Airlines

Frontier,United Airlines

See more direct flights

Reviews of the top 5 airlines serving from Reagan-National to Denver

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Denver. 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 Reagan-National to Denver? 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 4317 reviews
8.6Crew
8.0Comfort
7.5Entertainment
7.0Food
8.1Boarding
Airline reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

4.0 OkayKenny, Mar 2026
TPA - BWI
Read more Southwest reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

The flight was flying with 30% capacity. The flight my seat from preferred seating to back of the seat. Even though i can understand that this was to balance the flight weight. The flight attendance decided to do the serving near my seat and in the middle , their noices woke me up from sleep , when i realized that the service has ended and when they were going back asked for a coffee, for which they answered they have completed teh service in my location. That really upset me as they woke me up and also rejected the coffee i asked. I ended up landing with a headache, thanks to the crew that screwed up my travel

Delayed. Hot. Passenger next to me was so large I couldn’t move.

Same experience as the flight from Norfolk to Atlanta where people are boarded in zones that don't make sense. People behind you on the plane will get on before you and they take the luggage space on your row.

The boarding process doesn't make sense since some people that will sit behind your rows are boarded before you and then they take up the luggage space above your head. I then have to wait for people to get off the plane before I can go back to get my luggage.

Good flight. Connector flight was delayed so made a short turnaround in Atlanta which was stressful. Otherwise, great crew, Staff in ATL was very informative about the delay and ensured people their connections were fine. Notified the ones that were not. Great communication.

The flight went very well, but the flight attendants didn't serve and food or drinks other than 1st class due to rough air but to be honest it wasn't that bumpy and I felt that they could've at least offered water and coffee perhaps. Also serving 1st class only is a bad look. I've been in 1st class many times and I would've felt that if the turbulence was too rough for the main cabin, it would be too rough for 1st class too.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

It’s always a great time flying with united airlines.

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

As great a red-eye flight as red-eye flights can be.

Both of my flights arrived early and check in process was smooth

Everything was on time Will use united again for sure

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

The flight was fine. It's the satellite terminal that supports American eagle flights is what sucks. There is only one food option and everything there is way overpriced. I mean I know it's airport pricing, but it's even crazier than that. I bought a sandwich in a plastic container for $18.

This was one of the most frustrating travel experiences I've had to date. I had changed my flight day of to this one as it was slated to depart on time. It ended up being so delayed that my original flight took off before this one did. The boarding process began but eventually stopped and everyone had to get off the plane as a problem was identified. The person at the front desk just tried to laugh it off as if this wasn't already a huge inconvenience. From there, we eventually got to board only to sit at the gate for an additional hour because of some additional issue. This was extremely frustrating and caused a lot of stress.

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

The flight attendant use 1.5 hours to answer my call. My dirty food tray was unattended.

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

delayed due to weather. Could not communicate with family since the wifi was broken

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

We were told the flight was delayed 5 times, then it was moved to the next day.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

The experience was good. No frills but I got there safe and sound and on time.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

Frontier Airlines was AWFUL. I was an hour early for my flight and the lady refused to check me in. I had to purchase a whole new ticket with a different airline.

Late, terrible communication, horrible planning of passenger seating until the literal last minute. One of the worst flying experiences of my life. Y'all suck

Everything you need to know for your flight from Reagan-National to Denver

Information on your arrival and departure airports