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FIG 01 · Travel App Development

Travel apps that start with the supply you can actually sell

Booking engines, OTA and B2B portals, tour-operator apps and trip companions, built on the flight, hotel and activity supply you can access, with checkout designed for PCI DSS v4.0.1.

See how it works
Traveller planning a trip on a travel app by a sunny window, with a weekender bag and straw hat

FIG 02 · Quick answer

What does a travel app development company do?

Elgrith is a travel app development company building booking engines, OTA and B2B portals, tour-operator apps and trip companions. We start with distribution: IATA NDC, GDS and aggregator APIs such as Duffel, Expedia Rapid or Booking.com’s Demand API, and the access each requires. Then we build checkout designed for PCI DSS v4.0.1, multi-currency booking and Apple and Google Wallet passes.

Flights, stays and activities planned before screens
Supply first
Projects delivered since 2015
1,000+
Clients across the USA, UK and India
250+
Your code, repository and IP
100%

FIG 03 · Why it matters

Supply, standards and payments decide a travel app before design.

From the PCI Security Standards Council, IATA and Booking.com’s developer portal, read on 23 Oct 2026.

FIG 04 · Supply

Getting supply in 2026

A travel app is only as good as what it can sell. These are the main sources of supply, with what each gives you and what access it needs, checked on 23 Oct 2026.

Travel supply sources compared (checked 23 Oct 2026)
SourceWhat it gives youWhat access it needs
GDS (Amadeus, Sabre, Travelport)Flights, hotels and cars from many suppliers through one connectionCommercial agreement with the GDS; ticketing usually needs accreditation or a consolidator
Airline NDC APIsAirline offers with fares, bundles and ancillariesIATA’s NDC standard is open to third parties; each airline sets its own access
Flight aggregators (such as Duffel)Many airlines, including NDC content, through one modern APISign-up and commercial terms with the aggregator
Hotel and stays APIs (Expedia Rapid, Booking.com Demand API)Hotel and lodging inventory, rates and bookingPartner or affiliate approval with each supplier; Booking.com lists Demand API v3.3 as latest
Direct contractsTours, activities, transfers and your own inventoryYour contracts, loaded through an extranet or supplier API

Self-service developer programmes and partner terms change; we confirm each supplier’s current access before scoping. We hold no partner status, accreditation or reseller agreement with any GDS, airline, aggregator or hotel supplier.

Connecting supplier APIs? API integration

FIG 05 · What you get

Travel apps and platforms we build

Travel software development company services for startups, tour operators, TMCs and OTAs, on iOS, Android and web, with one back end for search, booking and service.

Phone showing a trip itinerary linked by a blue dotted line beside sunglasses, a pouch and coffee
Travel App Development · built in-house

01

Booking engines

Booking engine development for flights, stays, tours or packages: search, availability, pricing, hold and book, with supplier errors handled cleanly.

02

OTA and B2B travel portals

Consumer OTAs and agent portals with markups, credit limits, sub-agents and invoices.

03

Tour and activity apps

Tour listings, departures, capacity, guides and check-in for tour operators.

04

Corporate travel tools

Policy-aware booking, approvals, traveller profiles and spend reports for TMCs and companies.

05

Trip companions

Itineraries, documents, maps and alerts in one app for the whole trip.

06

Dynamic packaging

Flights, stays and extras combined into one price, with each component’s rules respected.

07

Multi-currency booking

Prices, payments and refunds in the traveller’s currency, reconciled to the supplier’s.

08

Admin and supplier management

Bookings, suppliers, markups, content and support tools for your operations team.

Deliverables

11

deliverables, in writing

Included in every build, written into your fixed quote before work starts.

FIG 06 · Access

Access before code

Who is allowed to sell what decides the architecture. We build for the access you have or arrange; Elgrith itself holds no IATA or ARC accreditation and sells no travel.

  • IATA or ARC accreditation

    What it is
    Accreditation that lets an agency issue airline tickets directly (IATA in most markets, ARC in the US)
    For the app
    Direct ticketing and settlement flows
  • Consolidator or host agency

    What it is
    An accredited partner that tickets on your behalf
    For the app
    Bookings passed to the partner for ticketing
  • Aggregator account

    What it is
    A flight or hotel aggregator that handles supplier connections and, in some models, ticketing
    For the app
    One API to integrate, with the aggregator’s terms
    API Integration
  • Merchant of record

    What it is
    Who charges the traveller’s card: you or the supplier
    For the app
    Decides payments, refunds, chargebacks and PCI scope
    Payment Gateway Integration

FIG 07 · Payments

Payments that pass audit

PCI DSS v4.0.1 is the current standard. The PCI Security Standards Council says 51 future-dated requirements took effect on 31 March 2025, including 6.4.3 and 11.6.1 on scripts running in the payment page. We design to keep your scope small; your acquirer or QSA confirms compliance.

06principles

  • Tokenized card capture

    Hosted fields or a hosted payment page from your provider, so card numbers don’t touch your servers.

  • Payment-page scripts (6.4.3, 11.6.1)

    An inventory of every script on the payment page, with authorization and change detection designed in.

  • 3-D Secure and SCA

    Strong customer authentication where cards and markets require it, with fallbacks that don’t lose the booking.

  • Refunds and changes

    Cancellations, partial refunds and fare differences reconciled with each supplier.

  • Payment gateway integration

    Stripe, PayPal, Razorpay and others, set up and tested.

    Payment gateway integration
  • Choosing a provider?

    How the main payment providers compare in 2026.

    Stripe vs PayPal vs Square

FIG 08 · EU packages

Selling packages in Europe

The revised Package Travel Directive, Directive (EU) 2026/1024, entered into force on 28 May 2026. EU countries have 28 months to transpose it, with full application expected from 2029 (EU Transition Pathways for Tourism, 22 Jul 2026). General guidance, not legal advice.

04principles

  • Complaints flow

    The revised directive asks organisers to acknowledge complaints within seven days and reply in full within sixty; we build the inbox, timers and audit trail.

  • Package or separate booking

    Each booking flagged as a package or not, so the right information, terms and protection apply.

  • Pre-contract information

    The information travellers must see before they book, kept as versioned content your legal team controls.

  • Built to change

    Rules held in configuration, so national transposition details can be added without a rebuild.

FIG 09 · In trip

The trip after booking

Most travel apps stop at the confirmation email. The trip is where loyalty is won or lost.

04principles

  • Apple Wallet and Google Wallet

    Boarding passes, tickets and booking passes through Apple PassKit and the Google Wallet API, updated when plans change.

  • Offline itineraries

    Bookings, documents, maps and directions saved on the device for flights and roaming.

  • Disruption alerts

    Delays, gate changes and cancellations pushed with the next step, not just the bad news.

  • Self-service changes

    Change, cancel or add extras in the app, within each supplier’s rules.

FIG 10 · AI

AI in travel apps

AI helps travellers plan and get help, as long as prices and availability always come from live supplier data, never from the model.

03principles

  • Trip planning

    Itinerary ideas from a traveller’s dates, budget and interests, turned into real, bookable options.

  • Concierge and support

    Answers about bookings, baggage and policies from your own content, with hand-off to a person.

  • Disruption handling

    Rebooking options suggested when plans break, confirmed by the traveller or an agent before anything changes.

    AI agent development

FIG 11 · Plan

Planning the build

Pages that help you choose the first release and the technology.

03principles

  • Starting with one product?

    One supplier, one market and the core booking flow, launched first.

    MVP development
  • One codebase for iOS and Android?

    Cross-platform travel apps with offline storage and wallet passes.

    Flutter app development
  • Booking on the web first?

    Booking engines and portals as fast web apps.

    Web app development

FIG 12 · Process · 6 steps

Secure the supply, then build

A free call, a fixed written quote, then sprints with weekly demos, starting from the supply and payment model you can actually use. You own the code and IP.

  1. Step 01

    Free call

    Tell us what you want to sell, to whom and where. We ask about supply, access, payments and margins, not just screens.

  2. Step 02

    Supply and access review

    Which suppliers, aggregators or GDSs fit, what access each needs, and who is merchant of record.

  3. Step 03

    Fixed written quote

    A written scope and a fixed quote, with what each release delivers, before any work starts.

  4. Step 04

    Sprints with weekly demos

    Design and build in sprints, with a demo every week against supplier test environments.

  5. Step 05

    Certification and launch

    Supplier certification steps where required, App Store and Google Play release and web launch.

  6. Step 06

    Support and change

    Supplier API changes, new suppliers and features, covered under terms agreed in your written scope.

FIG 13 · What you get

Everything included

Written into your fixed quote, so you know exactly what you are paying for before work starts.

11items

  • Written scope and fixed quote
  • Supply and access plan
  • UX and UI design
  • Booking engine and back end
  • iOS and Android apps or web portal
  • Supplier and aggregator integrations
  • Payment flow designed for PCI DSS v4.0.1
  • Apple Wallet and Google Wallet passes if in scope
  • Admin panel for bookings, markups and content
  • App Store and Google Play submission
  • IP assignment: code and data are yours

FIG 14 · Tech & tools

The tools behind the work

Proven, well-supported tools, chosen for your project and set up in accounts your business owns.

  • Next.js
  • React Native
  • Flutter
  • Swift
  • Kotlin
  • Node.js
  • Python
  • PostgreSQL
  • Redis
  • Elasticsearch
  • IATA NDC
  • Duffel API
  • Expedia Rapid API
  • Booking.com Demand API
  • Apple PassKit
  • Google Wallet API
  • Stripe
  • 3-D Secure

FIG 15 · Who it’s for

Travel apps for startups, tour operators and agencies.

A platform you own, built on the supply you can sell and the payment model you choose.

3 audiences

Travel startups

A new travel product on supply you can actually get.

Booking apps, trip planners and niche OTAs, starting with an aggregator or direct contracts so launch isn’t blocked by access you don’t yet have.

  • Aggregator-first supply
  • MVP in one market
  • Wallet passes
  • Code you own

FIG 16 · Working with us from the USA and UK

Built in New Delhi. Run on your hours.

Every project gets a point of contact in New York or London and an engineering team in New Delhi. Here is how today’s working days line up, live.

Three ways to work together

  1. 01

    Fixed-scope project

    A written scope, one fixed price and a dated plan. Suits websites, apps and MVPs.

  2. 02

    Dedicated team

    Designers and engineers on your roadmap every month, billed monthly.

  3. 03

    White label

    For US and UK agencies: our work, your brand, unbranded deliverables.

Every engagement

  • Fixed quote in USD, GBP or INR after a free 30-minute call
  • NDA before discovery. You own all code, designs and content
  • A working demo every sprint, not status slides
  • Reply within one business day, calls inside your hours
Book a call

Calls on ET or UK hours

FIG 17 · Money flow

Agency model vs merchant model in a travel app

Whether you sell as an agent or as the merchant changes payments, refunds and risk. We decide this with you before design.

Agency model vs merchant model in a travel app
Agency modelMerchant model
Who charges the cardUsually the supplierYou
How you earnCommission or booking feeMargin between your price and the supplier’s net rate
Refunds and chargebacksMostly the supplier’s processYours to handle and fund
PCI scopeSmallerLarger, so tokenization and hosted fields matter more

Many platforms mix both, by product or supplier. The choice affects your contracts, so confirm it with your suppliers and advisers.

Taking payments? Payment gateway integration

FAQ

Frequently asked questions

Straight answers about Travel App Development with Elgrith.

We don’t publish prices, because cost depends on the supply integrations, the payment model, which apps and portals you need and how much content you manage. Supplier and aggregator fees are separate. After a free call you get a written scope and a fixed quote.

Free 30-minute call

Build a travel app on supply you can actually sell.

Tell us what you want to sell, to whom and where. After a free call you get a written scope and a fixed quote.

connect@elgrith.com+91 96039 20001Start a project

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