1. What is an online flight booking app?
1.1. Concept of an online flight booking app
An online flight booking app is an application that allows users to search for flights, select schedules, book, pay, and manage their entire journey right on portable smart devices like phones and tablets. More than just a booking tool, modern apps have become 'personal travel assistants', helping passengers control their itinerary anytime, anywhere, providing timely reminders, and minimizing the risk of flight delays or missed schedules.
Sun PhuQuoc Airways opens ticket sales from October 15th. Photo: Collected
1.2. Common features of flight booking apps:
With just one app on a smart device, passengers can proactively complete the entire flight ticket purchasing process quickly and conveniently. Users can easily search for tickets by date, time, departure - arrival points. The app also suggests suitable itineraries for each travel or tourism need, accompanied by a diverse payment system such as bank cards, e-wallets, or bank transfers.
Besides that, passengers are always updated with important information including flight status, promotions, gate changes, or delay notifications. All booked tickets are centrally managed on the phone, allowing users to look up, issue invoices, or cancel/change tickets according to each airline's policy. Thanks to that, the experience of booking tickets and preparing for the flight becomes complete, convenient, and fully proactive.
1.3. Online flight booking apps are increasingly becoming a popular trend
A recent report by the World Tourism Organization shows that over 70% of global tourists have searched for and booked tourism services online, and this rate is expected to continue to grow strongly in the coming time. In Vietnam, the online ticket booking market is growing strongly. Especially, short routes such as Hanoi - Phu Quoc, Phu Quoc - Hanoi, Ho Chi Minh City - Da Nang... have a very high rate of booking via app.
From money transfer, dining, travel, shopping to entertainment… all daily life needs have gradually shifted to mobile platforms. Booking flight tickets is no exception to that trend, helping tourists find flight tickets at more preferential prices.
Airlines launch their own apps to save operating costs, optimize customer experience, increase the ability to offer exclusive promotions to app users, and reduce the load on the call center system. A typical example is the entry of Sun PhuQuoc Airways in 2025 - a new airline from Vietnam with a direction to modernize the entire passenger experience through Sun PhuQuoc App .
2. Why do passengers nowadays prefer booking flight tickets via app?
2.1. Booking tickets via app often receives many promotions
Apps often provide exclusive discount codes, limited promotion programs, super cheap ticket notifications during golden hours, and gifts, points accumulation, hotel - travel vouchers.
This type has many outstanding advantages such as no intermediary fees, many exclusive airline promotions, especially discount codes and vouchers only applicable on the app, points accumulation programs, cashback, or promotions for frequent customers, convenient ticket management, changes, and flight tracking, and service combos such as flight tickets + hotel + tour at better prices.
Travelers increasingly tend to book cheap flights on applications.
2.2. Maximum convenience - all operations in just a few seconds
With booking apps, passengers can book immediately while on the go, at work, or even in the middle of the night, without depending on the opening hours of ticket offices or customer service centers.
2.3. Easier to find cheap tickets
Online flight booking applications today are intelligently designed with many utilities to maximize user support. Thanks to flexible filters by day or by month, passengers can easily find the cheapest prices in each period. The system also automatically sends notifications when there are promotions, suggests low-price times, and compares prices across multiple flights in just a few seconds.
With these features, users only need a few simple steps to save costs for popular routes such as Hanoi – Phu Quoc, Phu Quoc – Hanoi, Ho Chi Minh City - Phu Quoc and vice versa, or any other flight route. This is a great advantage that makes booking via app a smart choice for many travelers today.
2.4. Transparent and proactive
Passengers have all ticket information at hand: ticket conditions, baggage, change policies, invoices… without depending on intermediary agents.
2.5. Safe - fast - accurate
In-app payments are highly secure, minimizing information errors. All flight updates arrive instantly via push notifications.
3. Popular cheap flight booking apps - everyone should know
3.1. Brand new airline Sun Phu Quoc Airways with an all-in-one app
The Sun PhuQuoc App application officially launches on November 25, promising a convenient experience for passengers.
The emergence of Sun PhuQuoc Airways along with the Sun PhuQuoc App application is expected to make the aviation market increasingly vibrant, especially as the airline positions itself as a modern - friendly - highly digitized utility airline. Launched on November 25, 2025, not just a simple booking app, Sun PhuQuoc App is built to turn a flight into a complete flight - resort - entertainment experience, connecting the Sun Paradise Land Phu Quoc ecosystem to every tourist.
Key features of Sun PhuQuoc App:
Search round-trip/one-way, apply promotion codes
Flight list by Economy/Business class; view nearby dates; filter by price/aircraft/departure-arrival times
Compare booking classes in a horizontal swipe format; prices shown include taxes and fees.
Travel alerts displayed (if any)
Automatically fill passenger names from 'Frequent Flyer Contacts'; fill in contact information if logged in
Hold booking; pay immediately (Credit Card, VNPay, VietQR) or pay later (up to ~6h, depending on flight and time)
Purchase additional services (luggage, seat selection, meals, passenger-specific Sun World tickets…)
Purchase additional services up to 1 hour before departure
Online check-in opens 24 hours before departure, customers can receive their electronic boarding pass instantly with just a few simple steps
Advantages:
All-in-one experience: booking, luggage, seat selection, meals, purchasing Sun World tickets. Directly connects to the Sun Group ecosystem, creating a synchronized Fly - Play - Stay journey, following the motto 'One app - complete flight journey'.
Purchase passenger-specific Sun World tickets; add services before the flight
Modern interface, smooth operation
Customers can select by region and choose multiple languages, optimizing the experience for different customer segments.
Support: Multi-channel customer service, 24/7
Real-time status tracking
Purchase additional services up to one hour before flight
VAT invoice issuance: request within 24h after payment; maximum 2 times/PNR; processed within 05 business days
Fast - Premium: Online check-in 24 hours in advance, receive electronic boarding pass
Can easily share/download/add Apple Wallet boarding pass
You can download the Sun PhuQuoc app starting from November 25, 2025 here !
3.2. Vietnam Airlines
Vietnam Airlines with its namesake app is the choice for those who frequently use the national airline. Photo: Collection
The national airline, a long-standing brand with the motto: Safety, Standard, International standard service. This airline is using a booking app that many passengers use.
Outstanding features of the app include:
Search, book tickets, online payment
Online check-in, receive electronic boarding pass
Manage bookings: change date, change seat, purchase extra baggage
Track flight status in real-time
Manage Bong Sen Vang account: earn miles – redeem miles
Advantages:
High stability
Smooth experience
Supports multiple payment methods
Reliable customer service
3.3. Vietjet Air
Passengers can install the Vietjet Air app to book tickets online. Photo: Collected
Vietnam's largest low-cost airline offers cheap flight tickets, accessible to many customer segments.
Key features of the app include:
Book cheap flights with a dense flight schedule
0 VND ticket hunting feature
Ticket management: change itinerary, purchase additional services
Online check-in
Advantages:
Competitive prices
Suggest cost-saving itineraries
Frequent in-app promotions
Simple interface, easy to use
3.4. Bamboo Airways
Bamboo Airways' online ticket booking application is easy to operate with a beautiful interface. Photo: Collected
The airline positions itself with 5-star service, premium offerings, bringing a convenient experience, combining travel with resort stays.
Outstanding features of the application include:
Booking economy - business - first class tickets
Managing itinerary, purchasing additional services
Tracking flight times, online check-in
Accumulating Bamboo Club points
Advantages:
Beautiful, luxurious interface
Choice of premium services
Optimized for leisure and business travelers
3.5. Vietravel Airlines
Passengers can check in online on Vietravel's booking app. Photo: Collected
The airline, part of the Vietravel tourism ecosystem, helps passengers experience convenience from travel to exploring attractions.
Key features of the app include:
Book tickets, choose travel packages as combos
Track flight schedules, receive change notifications
Online check-in and ticket storage
Advantages:
Many travel - resort combos
Friendly experience for tour guests
Discounts when booking tickets with Vietravel tours
3.6. OTA (Online Travel Agency) Platform
Additionally, passengers can purchase tickets through OTA (Online Travel Agency) platforms - online intermediaries connecting passengers with airlines such as Traveloka, Vntrip, Booking… making it convenient for buyers to compare prices, book tickets quickly, and have many choices. With this type of platform, passengers can compare prices from multiple airlines simultaneously, but there will be service fees and inconvenience when changing or refunding tickets compared to booking directly with the airline.
4. Tips for effectively booking cheap flights via app
4.1. Catching golden hour deals
Popular golden hours for airlines are usually 0h-2h, 11h-13h, 20h-22h. At this time, the system adds empty seats and updates prices according to algorithms. You should pre-open tabs for the itineraries you want to hunt for tickets, use the 'Price Tracking' or 'Flexible Ticket Price' features on the apps.
Note: Golden hour deals are usually limited in quantity and require quick action.
4.2. Book tickets early
Booking tickets early is a secret to reducing costs for popular routes like Hanoi - Phu Quoc. You should book 1-2 months in advance, which helps save significantly. Typically, ticket prices increase sharply during holidays, Tet, and weekends, and are 'softer' in the middle of the week (Tuesday-Thursday).
Note: Use the 'Lowest Price Calendar' feature on the apps to view all ticket prices for days in the month.
4.3. Enable discount notifications on the app
Enable discount notifications so you don't miss cheap tickets. Apps like Sun Phu Quoc App, Vietnam Airlines, Vietjet Air… all have push notification features to send alerts immediately when there are flash sales, receive warnings when prices drop for your tracked itineraries, and update exclusive offers only available on the app.
Small tip: Log in to your account and save your favorite itineraries so the algorithm prioritizes suggestions.
4.4. Flexible flight dates help reduce prices by 10-30%
Flexibly changing your travel date by just 1-2 days can significantly alter the price. The savings commonly encountered are: 10-30% depending on the route and season.
Small tip: Use the '7-Day Price Calendar' or '30-Day Price Calendar' features to compare prices and check prices for different flight times; typically, night or early morning flights are cheaper. Prime times (7h–9h or 17h–19h) are usually more expensive.
4.5. Utilize discount codes
Each airline has special promotional programs; take advantage of discount codes or member programs to optimize costs.
Booking tickets via app has become an inevitable trend of the era and is the smartest way to book cheap flights. Not only saving time, the app also offers many promotions, price comparison tools, convenient itinerary management features, and 100% control for passengers.
In 2025, the emergence of Sun Phu Quoc App from Sun Phu Quoc Airways - a new Vietnamese airline - promises to bring attractive, modern, and more preferential options for users. If you travel frequently, especially on the Hanoi - Phu Quoc, Phu Quoc - Hanoi routes, a smart app is the 'weapon' to help you hunt for cheap flight tickets every day.
> > > Frequently visit https://sunphuquocairways.com and Sun Phu Quoc app to hunt for tickets, be among the first to fly, and experience a premium travel style with the new airline brand from Sun Group.
