Flight search aggregator owned by Booking.com that compares prices across airlines and travel sites.
Budget-conscious travelers, price comparison shoppers, and those seeking booking flexibility
Online travel agency offering flights, hotels, cars, and package deals with global inventory.
Convenience-focused travelers, package deal seekers, and those requiring robust customer support
Kayak and Expedia are both major travel booking platforms, but they serve slightly different purposes. Kayak functions primarily as a metasearch engine aggregating flight, hotel, and car rental options, while Expedia is a full-service online travel agency with direct booking capabilities and package deals. The choice depends on whether you prefer comparing options across providers or booking directly through one comprehensive platform.
Kayak excels for price-conscious travelers who want to compare options across multiple providers and leverage data-driven booking insights, while Expedia is better for those seeking convenience through one-stop booking, package deals, and dedicated customer support. Your choice should reflect whether you prioritize comprehensive comparison shopping or streamlined all-in-one booking.
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Choose Kayak if
Budget-conscious travelers, price comparison shoppers, and those seeking booking flexibility
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| Metric | Kayak | Expedia | Diff |
|---|---|---|---|
| Monthly Website Visits(millions) | ~85 | ~120 | -29% |
| Price Comparison Coverage(partner count) | 1000+ | Direct inventory | — |
| Price Comparison Coverage(sites indexed) | 700+ airlines and OTA sites | Expedia Group properties + select partners |
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Choose Expedia if
Convenience-focused travelers, package deal seekers, and those requiring robust customer support
| +1300% |
| Hotel-Flight Bundle Discount(% savings) | No bundling available | 5-15% additional savings on combined bookings | -100% |
| Free Cancellation Window(hours) | Varies by airline/booking | 24 hours on most bookings | — |
| Direct Booking Integration(checkout steps) | Redirects to external sites (3-4 steps minimum) | Direct one-platform checkout (1-2 steps) | +100% |
| User Preference for Flexible Travel(% preference) | Recommended by 78% of flexible travelers | Preferred by 65% of fixed-plan travelers | +20% |
| Package Deal Savings(%) | 15-35% flight+hotel bundles | 15-35% flight+hotel bundles | — |
| Mobile App Rating (2026)(stars) | 4.3/5 stars | 4.3/5 stars | — |
| Customer Support Response Time(hours) | 4-12 hours average | 4-12 hours average | — |
| 2026 Revenue Growth Forecast(%) | 6-9% projected | 6-9% projected | — |
| Total Properties Listed(millions) | 1.5+ million properties | 1.5+ million properties | — |
| Average Hotel Cancellation Rate(%) | ~18-25% with One Key | ~18-25% with One Key | — |
| Base Loyalty Program Cost(USD) | Free entry (paid tiers available) | Free entry (paid tiers available) | — |
| 2026 Market Research Base(travelers surveyed) | 24,000+ global travelers | 24,000+ global travelers | — |
| Monthly Active Users(millions) | Expedia: 380M | Expedia: 380M | — |
| Total Reviews/Listings(billions) | Expedia: 50M reviews | Expedia: 50M reviews | — |
| Mobile App Rating(stars out of 5) | Expedia: 4.4 | Expedia: 4.4 | — |
| Average Booking Commission(percent) | Expedia: Direct pricing (0% markup) | Expedia: Direct pricing (0% markup) | — |
| Countries Covered(count) | Expedia: 190+ | Expedia: 190+ | — |
| Average Loyalty Program ROI(percent return) | Expedia: 4-6% | Expedia: 4-6% | — |
| Total Properties Available(properties) | 700,000+ | 700,000+ | — |
| Loyalty Rewards Rate(%) | Varies by membership tier (0-10%) | Varies by membership tier (0-10%) | — |
| Mobile App Rating (iOS)(stars out of 5) | 4.5 stars | 4.5 stars | — |
| Average Customer Service Wait Time(minutes) | 8-12 minutes | 8-12 minutes | — |
| Annual Revenue (2025)(USD billion) | $40 billion | $40 billion | — |
| Free Cancellation Coverage(%) | 85% of bookings | 85% of bookings | — |
| Global Market Share(%) | 22% of OTA bookings | 22% of OTA bookings | — |
All figures sourced from publicly available data. Last updated Jun 2026.
Kayak
Metasearch engine
Expedia
Full-service OTA
Kayak
Redirects to partner sites
Expedia
Direct booking on platform🏆
Kayak
Limited packages
Expedia
Extensive flight+hotel bundles🏆
Kayak
Superior organization features🏆
Expedia
Comprehensive booking tools
Kayak
Broad multi-provider comparison🏆
Expedia
Primarily own inventory
Kayak
Identifies Thursday as cheapest🏆
Expedia
General trend analysis
Kayak
~85 million visits
Expedia
~120 million visits🏆
Kayak
Limited direct support
Expedia
24/7 dedicated support🏆
Kayak's mobile app (iOS/Android) offers superior organization of travel plans and price tracking features. Expedia's app is comprehensive but more focused on completing bookings.
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| Attribute | Expedia | |
|---|---|---|
| Market Ranking(position) | #2 | — |
| Ideal Traveler Type (2026) | Flexible control-focused travelers | — |
| AI-Powered Features | Price tracking only | — |
| Price Prediction Accuracy(%) | Manual monitoring required | — |
| AI Personalization Features(level) | AI-enhanced pricing & recommendations | — |
| Booking Partners(count) | 200+ booking sites | — |
| International Price Data | Real-time Kayak Insights tracking | — |
| Google Ecosystem Integration | Limited | — |
| Flexible Date Search Options | Advanced matrix with multiple filters | — |
| Price Comparison Coverage(partner count) | 1000+ | Direct inventory |
| Cheapest Day Insights | Thursday identified (Jan 2026 data) | General trends |
| Booking Transparency Level | Fully transparent (complete details) | — |
| User Control During Booking | Full customization available | — |
| User Satisfaction Rating(score) | 4.6/5 | — |
| Transparent Flight Details(visibility) | 100% transparency before booking | Hidden details on Express Deal flights |
| Mobile App Rating (2026)(stars) | 4.3/5 stars | — |
| Mobile App Rating(stars out of 5) | Expedia: 4.4 | — |
| Mobile App Rating (iOS)(stars out of 5) | 4.5 stars | — |
| Monthly Website Visits(millions) | ~85 | ~120 |
| Direct Booking Capability | No (redirects) | Yes (on-platform) |
| Package Deal Options | Limited | Extensive |
| Mobile App Organization | Superior (iOS/Android) | Comprehensive |
| Mobile App Real-Time Alerts(feature completeness) | Basic price alerts available | Advanced real-time alerts with exclusive app perks |
| Customer Support Availability(hours/day) | Limited | 24/7 |
| Average Customer Service Wait Time(minutes) | 8-12 minutes | — |
| Booking Fee Structure | None | Variable |
| Hotel-Flight Bundle Discount(% savings) | No bundling available | 5-15% additional savings on combined bookings |
| Price Match Guarantee(available) | No | — |
| Hidden Fees Transparency(rating) | Good - occasional hidden charges | — |
| Average Domestic Roundtrip Airfare (Spring 2026)(USD) | Market competitive | — |
Show 1 more attributeYear-over-Year Airfare Change (Spring 2026)(% decrease) Not specified — | ||
| Price Comparison Coverage(sites indexed) | 700+ airlines and OTA sites | Expedia Group properties + select partners |
| Price Drop Protection(coverage) | Not available | Available on select mobile app bookings |
| Free Cancellation Window(hours) | Varies by airline/booking | 24 hours on most bookings |
| Average Hotel Cancellation Rate(%) | ~18-25% with One Key | — |
| Direct Booking Integration(checkout steps) | Redirects to external sites (3-4 steps minimum) | Direct one-platform checkout (1-2 steps) |
| User Preference for Flexible Travel(% preference) | Recommended by 78% of flexible travelers | Preferred by 65% of fixed-plan travelers |
| Flight Booking Options(airlines) | 1000+ airlines (comprehensive) | — |
| Package Deal Savings(%) | 15-35% flight+hotel bundles | — |
| Customer Support Response Time(hours) | 4-12 hours average | — |
| 2026 Revenue Growth Forecast(%) | 6-9% projected | — |
| Annual Revenue (2025)(USD billion) | $40 billion | — |
| Sustainability Initiatives(programs) | Carbon offset programs, sustainable stays | — |
| Total Properties Listed(millions) | 1.5+ million properties | — |
| Total Properties Available(properties) | 700,000+ | — |
| Base Loyalty Program Cost(USD) | Free entry (paid tiers available) | — |
| Average Loyalty Program ROI(percent return) | Expedia: 4-6% | — |
| Loyalty Rewards Rate(%) | Varies by membership tier (0-10%) | — |
| Monthly Organic Traffic Trend (2026)(% change) | Positive sustained growth | — |
| Global Inventory Scale | Expansive/comprehensive | — |
| 2026 Market Research Base(travelers surveyed) | 24,000+ global travelers | — |
| Monthly Active Users(millions) | Expedia: 380M | — |
| Total Reviews/Listings(billions) | Expedia: 50M reviews | — |
| Booking Features | Flights, Hotels, Cars, Activities, Packages | — |
| Customer Support Hours | 24/7 phone, chat, email | — |
| Average Booking Commission(percent) | Expedia: Direct pricing (0% markup) | — |
| Countries Covered(count) | Expedia: 190+ | — |
| Flight Booking Availability | Full integration with 500+ airlines | — |
| Free Cancellation Coverage(%) | 85% of bookings | — |
| Global Market Share(%) | 22% of OTA bookings | — |
Side-by-side comparison of numeric attributes