How to use a VPN to find cheaper flights

Buying a flight ticket is often a user-unfriendly experience. Airline companies are constantly adjusting their prices, meaning you might be seeing the price gradually go up while you wait for a deal.
A VPN (virtual private network) can be a solution to finding cheaper airfare. It lets you connect to servers from various locations, so you can compare regional prices to find the best deal.
By the end of this guide, you’ll have learned what really affects flight prices and how you can use a VPN to get cheaper flights.
Why do flight prices change so often?
Flight prices fluctuate constantly due to a complex mix of factors—some related to customer demand, others tied to operational costs like fuel prices, crew labor, airport fees, and aircraft maintenance. While demand still plays a major role, much of what influences prices lies in the way airlines manage and set those prices behind the scenes.
Airline revenue management systems
Airlines rely on sophisticated revenue management systems to set and adjust prices. These systems primarily use a pricing heuristic known as Expected Marginal Seat Revenue-b (EMSRb). It enables airlines to rapidly calculate prices for hundreds of thousands of flights daily by assigning seats to different fare classes.
However, according to a study published in the Quarterly Journal of Economics in 2024, EMSRb doesn’t take into account all the factors you might expect. For example, it typically does not factor in competitor pricing or the impact of substitution (when customers opt for a more convenient or cheaper flight on the same route). Instead, each flight’s prices are set independently, even though changing one price can affect demand for other flights on the same route.
Despite what many believe, airlines don’t dynamically adjust prices down to the penny. They operate with a fixed and relatively small menu of prices per flight, often just a handful of preset options spaced as much as $100 apart. A sudden price jump usually just means that one fare class has sold out and the next, more expensive class is now active.
Although airlines may seem to adjust prices constantly, in reality, they are working within rigid structures. For example, even if the airline would benefit from a $50 price increase, that option might not be available if there’s no corresponding fare level in the system.
Some airlines are experimenting with continuous revenue management, a more dynamic model that allows for finer-grained pricing, but even this won’t match the level of hyper-personalized targeting many consumers suspect.
Supply and demand
Classical supply and demand still influences ticket pricing. If a route becomes popular, especially during holidays or special events, fares often rise. Conversely, if demand is low, airlines may reduce prices to fill seats. However, because of the pre-set pricing tiers, this responsiveness is somewhat limited and not always immediate.
Cookies and user behavior tracking
A common belief is that airline websites use cookies to track your searches and raise prices if you seem interested in a specific route. While this practice is technically possible, there is no strong evidence that airlines use this data to directly inflate prices.
Although there may be a correlation between search behavior and price increases, studies like the one we mentioned above suggest that pricing changes are far more influenced by inventory and booking trends than by cookie data.
That said, booking platforms do use cookies to track user behavior for marketing and recommendation purposes. Read how to avoid that practice here.
How do airlines know your location?
Airlines and booking sites can tailor prices or experiences based on your location. Here’s how they do it:
IP address detection
Your IP address reveals your approximate location and is the primary method used to localize pricing and display currency. Some regions may see different prices due to regional pricing strategies or legal requirements. This is why using a VPN to appear in a different country can yield different fares (but not always better ones).
GPS and Wi-Fi data
Some mobile apps request GPS or use Wi-Fi triangulation for more accurate location data. This data is generally used for marketing, fraud prevention, or to comply with local laws, not to manipulate ticket pricing in real-time.
How to use a VPN for cheaper flights
Using a VPN to check for flight prices is significantly easier than you might expect, but success is not guaranteed. Follow these steps, and you might be able to get cheaper flights in a matter of minutes.
- Visit your preferred flight booking site.
- Write down the prices of the flight you’re looking at.
- Download and install ExpressVPN, or use a router with built-in VPN support like Aircove.
- Connect to a server in a different country. Choose regions like India, Mexico, Vietnam, or Thailand, where fares may be lower due to localized pricing.
- Open a private/incognito browser window. This prevents your search history and cookies from affecting prices.
- Visit your preferred flight booking site. If the page has problems loading, try refreshing it or clearing your browser cache.
- Write down the prices you see now.
- Disconnect, then reconnect to another region, and repeat the process until you’re satisfied that you’ve found a worthwhile deal.
- Reconnect to the region with the best prices and book your flight.
Is it legal to use a VPN to buy cheaper flights?
Yes, using a VPN to change your virtual location while shopping for flights is completely legal in most countries. Airlines and travel websites often display region-specific prices, and there’s no law against browsing from a different country. You’re simply looking at publicly available fare options from another location.
That said, make sure that you’re truthful about your personal details during the booking and payment process. You can read the airline’s terms if you’re unsure about booking from abroad or using a VPN, but in general, using a VPN to purchase cheaper flights is a perfectly safe and legal process.
Other benefits of using a VPN
Besides helping you save on flights, ExpressVPN provides:
- Enhanced online privacy: A good VPN encrypts your internet traffic and hides your IP address from snooping ISPs, trackers, or hackers. This makes it harder for corporations, criminals, or third parties to collect your personal data and protects you from data interception.
- Tracker protection: ExpressVPN uses built-in tracker blockers to stop websites from tracking your location, device, and behavior.
- Ad blocker: ExpressVPN’s ad blocker helps you avoid annoying pop-up ads and malicious advertisements.
- Secure public Wi-Fi use: They also protect you from cyber threats and data interception when browsing during a flight or from airports, cafés, or hotels.
- Avoid throttling: VPNs can help avoid ISP bandwidth throttling.
- Help you find better deals on other products: You can find better deals while using a VPN on more than just flights. Tech products, decorations, furniture, books, and anything else you can purchase online are also subject to dynamic and regional price changes.
Does Incognito or Private Mode get you cheaper flights?
Using Incognito or Private Mode might help avoid price increases in some situations, but it’s not the most effective solution and isn’t guaranteed to help. In fact, it’s more likely that it does nothing.
Incognito Mode and Private Mode prevent websites from storing cookies between sessions, so they can specifically help avoid price increases based on repeated searches. However, it’s important to note that it’s rare for multiple searches to increase prices, and many top airlines won’t consider this in their pricing.
Additionally, Incognito Mode does not hide your IP address or change your location. This means you’ll still see fares tailored to your physical region. You need a VPN like ExpressVPN to change what location the website believes you’re connecting from so you can see different regional prices and compare them. It also provides no additional security benefits while traveling.
Other ways to get cheaper flights
Here are 7 additional money-saving methods that you can try to get cheaper flights. It’s also worth noting that each of these methods is only improved by a VPN.
Book on a Sunday or late at night
According to a 2024 report by online travel agency Expedia, the best time to book a flight is Sunday. Many customers will save an average of 13% when purchasing a ticket on Sunday, making it a great weekly opportunity to find low-cost flights. Prices also tend to drop late at night when fewer users are online. This is because during busy periods, ticket prices rise due to the high demand.
This dynamic pricing model allows airlines to offer slightly reduced rates to fill seats. Consider combining this strategy with a VPN to test prices from various countries at off-peak hours for even better deals.
Book in advance
Flights will usually become more expensive the closer they get to departure. Flights will typically be cheaper when booking several months in advance. Try to book flights 1–3 months in advance for domestic travel and 2–6 months in advance for international travel to minimize costs. The prime booking time varies by region, but you should generally book before the 21-, 14-, or 7-day pre-departure windows, when prices often jump significantly. Last-minute bookings are costly, unless you find a flash sale.
Consider an “open jaw” trip
An open jaw ticket lets you fly into one city and return from another. For example, you might fly to Italy, Venice, from the U.S. but depart back from Verona. These routes are usually cheaper and more flexible than a round-trip, especially in Europe or Southeast Asia. Booking flights with stops in multiple cities is also a viable option.
Be flexible with travel dates
One of the easiest ways to save money on flights is by adjusting your travel dates. Buying your ticket on Sunday and then flying midweek, especially on Monday, Tuesday, or Wednesday, will usually be more cost-effective than traveling during peak times. Try to avoid flying on holidays or right before holidays, as ticket prices can skyrocket.
You might wonder, do flights get cheaper last minute? The answer is no. Typically, the exact opposite is true, and flights may get exponentially more expensive if you wait for the last minute.
Use a flight comparison tool
Sites like Google Flights analyze data from multiple booking platforms and airline companies at once to find you the best deals on flights. Many of the top platforms also let you track certain flights or get alerts when ticket prices are low or on sale. Rather than using an airline company’s website, you should use a reputable flight comparison tool.
Wait for Black Friday flight deals or other airline sales
Airlines regularly run sales around Black Friday, Cyber Monday, and other business-related holidays. These flash sales can dramatically reduce the cost of airfare, especially if you book for an off-season flight.
Check for error fares
Error fares happen when an airline accidentally lists the wrong price, often much lower than intended. These mistakes can be due to technical glitches, currency conversion issues, or human error.
Some online services specialize in alerting users to error fares, but these deals are highly cutthroat and time-sensitive. Don’t be surprised if you check your phone 10 minutes later and the deal is already gone.
FAQ: Common questions about using a VPN to find cheap flights
Which VPN gives the cheapest airline tickets?
While the VPN itself doesn’t give you airline tickets, ExpressVPN is a great option for finding affordable prices, and not just for airline tickets. ExpressVPN has servers in 105+ countries, so you can compare prices from a wide range of regions to find the best price on a wide variety of goods and services.
Do airlines track my IP address?
Yes, airlines and travel sites can track your IP address to determine your location, which they may use to inform their dynamic pricing models to adjust prices accordingly. That’s why users in different regions report varied costs.
Can I get cheaper flights with a free VPN?
In theory, yes, but free VPNs come with major downsides. They often have slower speeds and fewer location options, and disreputable free VPNs may compromise your privacy more than protect it. Many free VPNs don’t allow you to pick your server and instead connect you to an optimized nearby location; this may not even trigger a price change.
I highly recommend using a premium brand like ExpressVPN with a ton of server locations and a secure privacy policy. You can also try other methods of finding cheap tickets, such as an open-jaw flight or waiting for a flash sale.
What is the cheapest country from which to book flights using a VPN?
There’s no definitive answer, but in general, the cheapest countries to book flights with a VPN are countries with lower average incomes, such as Vietnam, India, Mexico, or Malaysia. It’s worth experimenting with several regions using ExpressVPN to find the best prices.
Do flights get cheaper last minute?
Not usually. Last-minute flights are actually more expensive on average, especially for popular routes or during peak times. However, sometimes airline companies may put a flash sale on the last tickets available just before a flight, so it’s possible to get lucky.
How can I reduce my flight ticket price?
Clear your cookies before searching and book flights in incognito mode. Also, set price alerts, buy tickets on Sundays and well in advance, and consider flying midweek. Combine all of these tips with ExpressVPN to compare prices in different regions so you can find the cheapest flights available.
Which is the cheapest day to book flights?
At the moment, Sunday seems to be the cheapest day to book a flight. Historically, Tuesday and Wednesday were considered the cheapest days to book flights. Due to the dynamic pricing models, this answer can change over time.
Is it safe to book flights using a VPN?
Yes, it’s perfectly safe. In fact, using a reputable VPN like ExpressVPN adds a needed extra layer of encryption and privacy to the entire booking process. Then, you can use it to keep your data private while using the airport’s public Wi-Fi. Essentially, a good VPN helps you find better deals, protects you during the transaction, and keeps your device secure while you’re at the airport.
Take the first step to protect yourself online. Try ExpressVPN risk-free.
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Comments
Have any studies been done on dynamic pricing? Could you post sources that back up your claims?