Travel & marketplace · United States · USD
Cost to build an app like Expedia
An Expedia-like app is several booking products in one, and packaging them together is what makes it hard. Flights, hotels and cars each have their own suppliers, rules, cancellation policies and failure modes — and a package booking has to either complete across all of them or roll back cleanly when the flight succeeds and the hotel does not.
What you are actually building
An app like Expedia is three or four screens people recognise sitting on a great deal of engineering they never see. These are the screens that define the shape — and the part of each one that costs real money.
Search and availability
Dates, occupancy, pricing rules and a calendar that never offers a slot already taken. Availability is a race condition with a UI.
Booking and money
Deposits, cancellation windows, holds and payouts to the other side. Money resting between two strangers needs a real ledger.
Trust
Verification, reviews, messaging and disputes. A two-sided marketplace is bought on trust long before it is bought on price.
Price your own version
The calculator below is preloaded with the Expedia template — its features, architecture and a planning scale for year one. Remove what you do not need, add what you do, and the estimate follows.
Building an app like Expedia
A starting template, not a specification. Every feature, number and technology choice below is yours to change.
Reference template
Expedia
An Expedia-like app is several booking products in one, and packaging them together is what makes it hard. Flights, hotels and cars each have their own suppliers, rules, cancellation policies and failure modes — and a package booking has to either complete across all of them or roll back cleanly when the flight succeeds and the hotel does not.
- Preloaded features
- 23
- Category
- Travel & hospitality
Search and availability
Dates, occupancy, pricing rules and a calendar that never offers a slot already taken. Availability is a race condition with a UI.
Booking and money
Deposits, cancellation windows, holds and payouts to the other side. Money resting between two strangers needs a real ledger.
Trust
Verification, reviews, messaging and disputes. A two-sided marketplace is bought on trust long before it is bought on price.
What makes an Expedia-like app expensive
Three things dominate this shape of product. Everything else is comparatively ordinary app development.
Flight search
Multi-leg itineraries, fare rules, seat availability and pricing that changes between search and booking. The most complex search problem in consumer travel.
Cross-product transactions
A package booking spanning three suppliers needs distributed-transaction handling with compensating actions when one leg fails.
Supplier breadth
Each airline, hotel chain and car provider is an integration with its own quirks, and they never fail in the same way.
Cost breakdown for the default template
Before you change anything. Costed at the midpoint of a $118–$155/hr blended US rate.
Features in an Expedia-like app
The starting list, longest build first — each bar is that feature’s share of the biggest one, so you can see where the hours actually go. Every row is a checkbox in the calculator above: this is a template, not a specification.
Core features (18)
941h totalAdvanced features (5)
568h totalIntegrations (7)
- Stripe
- Google Maps Platform
- SendGrid / Resend (email)
- Twilio (SMS & voice)
- AWS
- Amplitude / Mixpanel
- Sentry / Datadog (monitoring)
How long, and who builds it
The $840,000–$1,373,000 figure assumes this schedule and this team. Both scale with the answers in the calculator above — and neither is a quote.
Delivery timeline — 9–13 months
- Discovery & product definition4–6 wks
- UI/UX design6–9 wks
- Development (app + backend)20–29 wks
- Integrations & infrastructure5–8 wks
- QA & security testing5–8 wks
- Store submission & launch2–3 wks
The team — 9 people
- Product manager1×
- Business analyst1×
- UI/UX designer1×
- Mobile developer1×
- Backend developer2×
- DevOps / SRE1×½
- QA engineer1×
- Data / ML engineer1×
The phases add to more than the total on purpose: design starts before discovery finishes and QA runs alongside development rather than after it. 9 people is about 8.5 full-time equivalents — a smaller team takes proportionally longer, and a much larger one does not go proportionally faster. The two roles most often missing from a first plan are DevOps and QA, which together are 16% of this build.
Technology considerations
A stack that would serve this product shape well. A recommendation for what you could build — not a claim about what Expedia runs.
| Layer | Suggestion |
|---|---|
| Mobile | React Native — the product is search, browse and book rather than device hardware |
| Backend | Node.js or Java services with availability and pricing isolated |
| Database | PostgreSQL with PostGIS for location search, read replicas for browse traffic |
| Cache | Redis for availability and search results, with careful TTLs |
| Search | OpenSearch or Algolia with geo, date and facet filtering |
| Real-time | WebSocket for messaging between the two sides |
| Cloud | AWS |
| Object storage | S3 for listing photography |
| CDN | CloudFront with responsive image variants |
| Media pipeline | Image processing pipeline for listing photos |
| Monitoring | Datadog with search-to-book funnel dashboards |
| ML serving | A managed inference endpoint (SageMaker, Vertex AI) with an offline evaluation pipeline |
Top cost drivers
- 1
Medium scale traffic and usage17% of the build
Caching, queues and real monitoring become mandatory. That is real engineering: caching layer (redis or equivalent) in front of hot reads; background job queue for anything slower than a request; read replicas and query-level database tuning. Lower your year-one traffic assumptions and this shrinks immediately.
- 2
Enterprise backend architecture15% of the build
Justified by a contractual uptime commitment, a regulated workload, or a user base large enough that an hour of downtime is a material financial event.
- 3
7 third-party integrations5% of the build
Every external service is code you write, failure modes you handle and an API that will change without asking you. The ones you can defer are the cheapest scope cuts available.
- 4
Premium design3% of the build
Roughly 32 screens with research, motion and accessibility work. Dropping to Custom would save a meaningful share of this without making the product look unfinished.
- 5
React Native2% of the build
A shared codebase covers both stores, with native work still required around hardware, payments and background processing.
- 6
PCI DSS compliance work2% of the build
Engineering and evidence work to make an audit survivable. Certification fees, legal review and auditor time are separate costs that this estimate excludes.
Infrastructure and maintenance
Neither of these is part of the build figure, and neither of them stops.
Cloud infrastructure
$909 – $9K/month
- Baseline environment$120–$420
- Application compute$135–$480
- Database$7–$27
- Object storage$105–$130
- CDN & bandwidth$2–$5
- Transaction processing infrastructure$0–$2
Annual maintenance
$126K – $343K/year
15–25% of build cost per year: bug fixes, iOS and Android version updates, SDK and dependency upgrades, security patching and small improvements. Cloud costs are the separate figure alongside.
Building an app like Expedia — common questions
How much does it cost to build an app like Expedia?
Using this site's default profile — 23 features, react native, a enterprise backend and medium scale traffic — the estimate is $840,000 to $1,373,000 for a US team, or roughly 7,906 engineering hours at a blended $118–$155 per hour. That figure covers design, both apps, backend, infrastructure, integrations, security, QA, DevOps and project management. It excludes cloud hosting, vendor fees, marketing and legal. Change any answer in the calculator on this page and the number moves with it.
How long does it take to build an app like Expedia?
About 9–13 months with the team this estimate assumes — 9 people, roughly 8.5 full-time equivalents. Discovery and design run first and partly in parallel, development takes about half the calendar, and QA overlaps the back half rather than following it. A smaller team takes proportionally longer; a much larger one does not go proportionally faster, which is why compressing this schedule costs more than it saves below a certain point.
What team do you need to build an app like Expedia?
1× product manager, 1× business analyst, 1× ui/ux designer, 1× mobile developer, 2× backend developer, 1× devops / sre (part-time), 1× qa engineer, 1× data / ml engineer. That is what 7,906 hours of work distributed across 10 disciplines actually requires. The roles people most often leave out of their own plan are DevOps and QA, which together are about 16% of this build.
What does an app like Expedia cost to run each month?
Cloud infrastructure is estimated at $909 to $8,914 per month at the scale this profile assumes, driven mainly by compute and database. Third-party services add $300 to $9,000. Separately, budget $126,000 to $343,000 a year for maintenance — bug fixes, OS and SDK updates and security patching. None of these are part of the build figure.
Should a first version cover all travel products?
No. Almost every successful travel product starts with one vertical and adds others once the supply relationships exist. Building all three at once roughly triples the integration workstream.
What happens when part of a package fails?
You need compensating transactions — cancel what succeeded, refund what was charged, and tell the customer something coherent. Designing that properly is 200+ hours on its own and it is not optional.