Best Sites to Book Cheap Airline Tickets

Momondo

A visually driven metasearch that excels at showing price trends and flexible-date savings. Momondo aggregates fares from airlines and OTAs, highlights “Mix & Match” one-way combinations, and offers robust filters and price-tracking tools—ideal for travelers who want to scan date flexibility and spot bargains quickly. Note that Mix & Match fares may require separate bookings.

Why use it: Momondo shows clear price trends and strong price‑tracking tools, making it easy to see whether shifting dates will save money. It also displays Mix & Match (two one‑way tickets on different airlines) options to lower costs.

Watch out: Mix & Match fares often require separate bookings on different sites, which can complicate connections or transfers.

Best for: Travelers who want visual price trends and flexible itineraries.

Kayak

A powerful metasearch and deal‑finder with advanced tools for flexible travelers. Kayak compares many sites at once, can combine two one‑way tickets into one itinerary, and adds features like Price Alerts, PriceCheck (screenshot comparisons) and AI assistance via Ask Kayak. Best used to discover deals and explore alternative dates or routings.

Why use it: Kayak compares many sites at once and can combine two one‑way flights into a single itinerary. Newer features like PriceCheck (compare a screenshot to other offers) and Ask Kayak (AI help) add convenience.

Watch out: Kayak’s strength is deal discovery—if your travel dates are fixed, its flexible search tools are less useful.

Best for: Flexible travelers hunting for the lowest dates or mixing one‑ways.

Expedia

A full‑service OTA with broad inventory and a loyalty program (One Key) that rewards members across flights, hotels, cars and packages. Expedia is convenient for bundling travel and earning site rewards, but booking through it can limit elite status earning and upgrade eligibility on some airlines.

Why use it: Reliable OTA with a broad inventory and a loyalty program (One Key) that offers member pricing and points that can be redeemed across hotels, flights and packages.

Watch out: Booking through Expedia can limit elite‑status earning and upgrade eligibility on some airlines.

Best for: Travelers who value package deals or want to earn/ use One Key points.

Priceline

An OTA known for useful calendar views and discount “Express Deals” (opaque fares that hide certain details until after purchase). Priceline can deliver steep savings for flexible travelers, though opaque purchases carry uncertainty about exact times or carriers.

Why use it: Useful calendar view for spotting cheap dates and Express Deals (opaque bookings) for big discounts if you’re flexible on exact times/airlines.

Watch out: Express Deals sometimes turn out to be less advantageous than standard fares and hide flight details until after purchase.

Best for: Flexible travelers willing to accept some uncertainty for deeper discounts.

Orbitz

Reliable OTA with an easy interface and Orbitz Rewards (Orbucks) you can redeem on hotels. Orbitz offers a 24‑hour cancellation policy and a low‑price guarantee, but occasionally tacks on small booking fees—check the checkout carefully.

Why use it: Orbitz Rewards earns Orbucks on bookings (redeemable for hotels), plus a 24‑hour cancellation policy and a low‑price guarantee.

Watch out: Orbitz sometimes charges a small booking fee; read the checkout carefully.

Best for: Travelers who book both hotels and flights and want to pool rewards.

Agoda

An OTA owned by Booking Holdings, Agoda is best known for strong hotel and vacation‑rental inventory (particularly across Asia) and for multilingual support. It offers simple flight searches, but its flight filters are more limited than full metasearch sites.

Why use it: Often excellent hotel/apartment deals (especially in Asia), multilingual site, and useful “Secret Deals.”

Watch out: Basic flight search and fewer filtering options; occasional variability in customer service and nonrefundable rates.

Best for: Booking accommodations (and package deals) in Asia or when you want quick, multilingual hotel searches; pair with a metasearch engine for flight price checks.

Hotwire

Strong for packaged savings, Hotwire often yields lower total costs when booking flight+hotel together. The site promotes bundled deals and has a low‑price guarantee, though occasional booking fees may apply.

Why use it: Strong packaged savings—booking a flight and hotel together often yields lower total cost.

Watch out: Booking fees occasionally apply; read the terms on package deals.

Best for: Travelers who want bundled flight+hotel savings.

Skyscanner

A flexible metasearch especially useful for inspiration and open‑ended searches. Skyscanner’s “Explore everywhere” feature and multi‑city searches make it easy to find cheap destinations across a range of dates and currencies, with simple price alerts—though you’ll click through to other sites to complete purchases.

Why use it: Great for flexible searches—“Explore everywhere” helps you find cheap destinations. Easy language and currency switching and useful price alerts.

Watch out: No rewards program and it links out to other sites to complete booking.

Best for: Flexible travelers looking for destination inspiration and price discovery.

Travelocity

A familiar OTA with solid search filters, a price‑guarantee, and 24‑hour free cancellation on most airlines. Travelocity is user‑friendly, but like other OTAs you should watch for booking fees and last‑minute price changes during checkout.

Why use it: Similar to other OTAs with price‑guarantee and a 24‑hour cancellation window on most airlines.

Watch out: Prices can change between selecting a flight and final payment; booking fees may apply.

Best for: Travelers who like an established OTA with customer protections.

Google Flights

Fast, intuitive metasearch built on ITA Matrix technology that’s great for quick fare discovery and trend analysis. Google Flights shows price graphs, date grids, and price‑tracking alerts, and on select U.S. routes offers a limited price‑guarantee refund. It’s an excellent first step to locate cheap dates and routes, though bookings are completed on airline or OTA sites.

Why use it: Fast, powerful search backed by ITA Matrix technology. Google Flights shows price graphs and date grids, enables price tracking, and (on select U.S. flights) offers a price‑guarantee refund up to certain limits.

Watch out: Its many options can be overwhelming for novices, but it’s still an excellent first step to spot cheap dates and routes.

Best for: Quick, comprehensive fare discovery and price tracking.

CheapOair

An OTA that sometimes lists competitive fares but can add substantial agency and change/cancellation fees. CheapOair offers a limited price‑match promise, so compare total out‑the‑door costs (including fees) before booking.

Why use it: Price match promise on limited criteria.

Watch out: Can charge significant agency/booking fees (sometimes much higher than competitors) and fees for changes or cancellations—even within 24 hours.

Best for: Compare cautiously—check total cost including fees before booking.

Hopper

A mobile‑first app that predicts the best time to buy and lets you set watches for trips or whole months. Hopper’s simple interface and buy/watch recommendations are helpful for casual, flexible travelers—but it lacks desktop searching and advanced filters.

Why use it: Predictive app that claims to identify the best purchase windows and sends buy/watch advice. Simple interface and excellent for month‑view browsing.
Watch out: Mobile‑only, with limited filters and no desktop search.
Best for: Mobile users who want buy‑now or watch recommendations.

How to use these sites together

1. Start with a metasearch (Google Flights, Kayak, Skyscanner, Momondo) to identify the cheapest dates, routing and airlines.  
2. Use price alerts to track fares for a few days or weeks if you aren’t traveling immediately.  
3. Compare OTAs (Expedia, Priceline, Hotwire, Orbitz, Travelocity) for package deals, rewards, or occasional OTA‑only promos.  
4. Check the airline’s website last—if the fare is the same, booking direct often simplifies changes and award redemptions.  
5. Always scan the final total (fees, seat assignments, baggage) before confirming.

Final thoughts

There’s no single site that always guarantees the lowest fare. Flexibility—on dates, times and airports—plus using multiple search tools and watching prices will deliver the best savings. For straightforward, single flights, begin with Google Flights or Kayak; for package deals or loyalty perks, compare OTAs; and when in doubt, check the airline site and read the fare rules before you buy.

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