diff --git a/checkout_sdk/payments/setups/setups.py b/checkout_sdk/payments/setups/setups.py
index 7f7746a8..ed4fd97b 100644
--- a/checkout_sdk/payments/setups/setups.py
+++ b/checkout_sdk/payments/setups/setups.py
@@ -4,7 +4,6 @@
 
 from checkout_sdk.common.common import Address, Phone
 from checkout_sdk.common.enums import Currency
-from checkout_sdk.payments.contexts.contexts import PaymentContextsTicket
 from checkout_sdk.payments.payments import PaymentType, ShippingDetails
 
 
@@ -582,15 +581,263 @@ class Order:
 
 
 # Industry entities
-class AirlineData:
-    ticket: PaymentContextsTicket
-    passengers: list  # list of PaymentContextsPassenger
-    flight_leg_details: list  # list of PaymentContextsFlightLegDetails
+
+class PaymentSetupAccommodationAddress:
+    """The accommodation's address."""
+    # The first line of the address.
+    # [Optional]
+    address_line1: str
+    # The address city.
+    # [Optional]
+    city: str
+    # The address state or county.
+    # [Optional]
+    state: str
+    # The address country, in ISO 3166-1 alpha-2 format.
+    # [Optional]
+    country: str
+    # The zip code or postal code.
+    # [Optional]
+    zip: str
+
+
+class PaymentSetupAccommodationGuest:
+    """A guest staying at the accommodation."""
+    # The guest's first name.
+    # [Optional]
+    first_name: str
+    # The guest's last name.
+    # [Optional]
+    last_name: str
+    # The guest's date of birth.
+    # [Optional]
+    # format: date (YYYY-MM-DD)
+    date_of_birth: str
+
+
+class PaymentSetupAccommodationRoom:
+    """A room booked by the customer."""
+    # The rate or cost of the room per day.
+    # [Optional]
+    rate: float
+    # The number of nights the room is booked for.
+    # [Optional]
+    number_of_nights: int
+    # The room class or type booked. For example, `deluxe`. Free-form string, not an enum.
+    # [Optional]
+    type: str
+
+
+class PaymentSetupAccommodationHost:
+    """Details about the host of the accommodation."""
+    # The date the host registered.
+    # [Optional]
+    # format: date (YYYY-MM-DD)
+    registration_date: str
+    # The total number of reservations the host has received.
+    # [Optional]
+    total_reservation_count: int
+
+
+class PaymentSetupAccommodation:
+    """Details about the accommodation booking. For lodging or cruise bookings."""
+    # For lodging, contains the lodging name that appears on the storefront/customer receipts.
+    # For cruise, contains the ship name booked for the cruise.
+    # [Optional]
+    name: str
+    # A unique identifier for the booking.
+    # [Optional]
+    booking_reference: str
+    # For lodging bookings, the customer's check-in date.
+    # For cruise bookings, the cruise departure date (sail date).
+    # [Optional]
+    # format: date (YYYY-MM-DD)
+    check_in_date: str
+    # For lodging bookings, the customer's check-out date.
+    # For cruise bookings, the cruise return date.
+    # [Optional]
+    # format: date (YYYY-MM-DD)
+    check_out_date: str
+    # The accommodation's address.
+    # [Optional]
+    address: PaymentSetupAccommodationAddress
+    # The total number of rooms booked for the accommodation.
+    # [Optional]
+    number_of_rooms: int
+    # The list of guests staying at the accommodation.
+    # [Optional]
+    guests: list  # list of PaymentSetupAccommodationGuest
+    # The list of rooms booked by the customer.
+    # [Optional]
+    room: list  # list of PaymentSetupAccommodationRoom
+    # The total number of guests on the booking.
+    # [Optional]
+    total_number_of_guests: int
+    # Specifies whether the booking is refundable.
+    # [Optional]
+    refundable: bool
+    # The recipient the booking confirmation is delivered to.
+    # [Optional]
+    delivery_recipient: str
+    # Details about the host of the accommodation.
+    # [Optional]
+    host: PaymentSetupAccommodationHost
+
+
+class PaymentSetupAirlineTicket:
+    """Details about the airline ticket."""
+    # The ticket's unique identifier.
+    # [Optional]
+    number: str
+    # The date the airline ticket was issued.
+    # [Optional]
+    # format: date (YYYY-MM-DD)
+    issue_date: str
+    # The carrier code of the ticket issuer.
+    # [Optional]
+    issuing_carrier_code: str
+    # The travel package indicator, as one of the following codes: `A` (Airline flight
+    # reservation), `B` (Car rental and airline reservation), `C` (Car rental reservation),
+    # `N` (Unknown). Free-form string in the spec, not a typed enum.
+    # [Optional]
+    travel_package_indicator: str
+    # The name of the travel agency.
+    # [Optional]
+    travel_agency_name: str
+    # The IATA or ARC unique identifier for the travel agency that issues the ticket.
+    # [Optional]
+    travel_agency_code: str
+
+
+class PaymentSetupAirlinePassengerAddress:
+    """Details about the passenger's address."""
+    # The two-letter ISO country code of the passenger's country of residence.
+    # [Optional]
+    country: str
+
+
+class PaymentSetupAirlinePassenger:
+    """A passenger on the flight."""
+    # The passenger's first name.
+    # [Optional]
+    first_name: str
+    # The passenger's last name.
+    # [Optional]
+    last_name: str
+    # The passenger's date of birth.
+    # [Optional]
+    # format: date (YYYY-MM-DD)
+    date_of_birth: str
+    # Details about the passenger's address.
+    # [Optional]
+    address: PaymentSetupAirlinePassengerAddress
+
+
+class PaymentSetupFlightLegDetails:
+    """A flight leg booked by the customer."""
+    # The flight identifier.
+    # [Optional]
+    flight_number: str
+    # The IATA 2-letter accounting code (PAX) that identifies the carrier. Required if the
+    # airline data includes leg details.
+    # [Optional]
+    carrier_code: str
+    # A one-letter identifier for the travel class. For example: `F` (First class),
+    # `J` (Business class), `W` (Premium economy class), `Y` (Economy class).
+    # [Optional]
+    class_of_travelling: str
+    # The IATA three-letter airport code for the departure airport. Required if the
+    # airline data includes leg details.
+    # [Optional]
+    departure_airport: str
+    # The date of the scheduled take-off.
+    # [Optional]
+    # format: date (YYYY-MM-DD)
+    departure_date: str
+    # The time of the scheduled take-off.
+    # [Optional]
+    departure_time: str
+    # The IATA three-letter airport code for the destination airport. Required if the
+    # airline data includes leg details.
+    # [Optional]
+    arrival_airport: str
+    # A one-letter code that indicates whether the passenger is entitled to make a stopover.
+    # Specify `O` or a blank space if the passenger is entitled. Specify `X` if not entitled.
+    # [Optional]
+    stop_over_code: str
+    # The alphanumeric fare basis code.
+    # [Optional]
+    fare_basis_code: str
+
+
+class PaymentSetupAirlineInsurancePrice:
+    """The price of the travel insurance."""
+    # The insurance amount, in the minor currency unit.
+    # [Optional]
+    amount: float
+    # The currency of the insurance amount, as a three-letter ISO currency code.
+    # [Optional]
+    currency: str
+
+
+class PaymentSetupAirlineInsurance:
+    """Details about the travel insurance purchased with the booking."""
+    # The type of insurance.
+    # [Optional]
+    type: str
+    # The name of the insurance company.
+    # [Optional]
+    company: str
+    # The price of the insurance.
+    # [Optional]
+    price: PaymentSetupAirlineInsurancePrice
+
+
+class PaymentSetupAirline:
+    """Details about the airline ticket and flights the customer booked."""
+    # Details about the airline ticket.
+    # [Optional]
+    ticket: PaymentSetupAirlineTicket
+    # The list of passengers on the flight.
+    # [Optional]
+    passengers: list  # list of PaymentSetupAirlinePassenger
+    # The list of flight legs booked by the customer.
+    # [Optional]
+    flight_leg_details: list  # list of PaymentSetupFlightLegDetails
+    # The total number of passengers on the booking.
+    # [Optional]
+    total_number_of_passengers: int
+    # The type of travel. For example, `domestic` or `international`. Free-form string,
+    # not a typed enum.
+    # [Optional]
+    travel_type: str
+    # The type of trip. For example, `one_way` or `round_trip`. Free-form string,
+    # not a typed enum.
+    # [Optional]
+    trip_type: str
+    # Specifies whether the booking is refundable.
+    # [Optional]
+    refundable: bool
+    # The recipient the ticket is delivered to.
+    # [Optional]
+    delivery_recipient: str
+    # Any additional add-ons purchased with the booking. For example, `extra_baggage`.
+    # A single string per the spec, not an array, despite the plural name.
+    # [Optional]
+    ancillaries: str
+    # Details about the travel insurance purchased with the booking.
+    # [Optional]
+    insurance: PaymentSetupAirlineInsurance
 
 
 class Industry:
-    airline_data: AirlineData
-    accommodation_data: list  # list of AccommodationData
+    """Industry-specific information."""
+    # The list of airline bookings associated with the payment.
+    # [Optional]
+    airline: list  # list of PaymentSetupAirline
+    # The list of accommodation bookings associated with the payment.
+    # [Optional]
+    accommodation: list  # list of PaymentSetupAccommodation
 
 
 # Billing entity
diff --git a/tests/payments/setups/payment_setups_serialization_test.py b/tests/payments/setups/payment_setups_serialization_test.py
index b8cc0162..6e1cd860 100644
--- a/tests/payments/setups/payment_setups_serialization_test.py
+++ b/tests/payments/setups/payment_setups_serialization_test.py
@@ -14,6 +14,11 @@
     CardPresentPin, PayByBank, PayByBankAction, PayByBankActionType, PayByBankBank, Stablecoin,
     PaymentSetupBillingDescriptor, PaymentSetupPresentmentDetails, PaymentSetupTerminal,
     PaymentSetupAmountAllocation, AmountAllocationCommission, Order,
+    Industry, PaymentSetupAccommodation, PaymentSetupAccommodationAddress,
+    PaymentSetupAccommodationGuest, PaymentSetupAccommodationRoom, PaymentSetupAccommodationHost,
+    PaymentSetupAirline, PaymentSetupAirlineTicket, PaymentSetupAirlinePassenger,
+    PaymentSetupAirlinePassengerAddress, PaymentSetupFlightLegDetails,
+    PaymentSetupAirlineInsurance, PaymentSetupAirlineInsurancePrice,
 )
 
 
@@ -364,3 +369,159 @@ def test_order_serializes_amount_allocations(self):
                 'commission': {'amount': 100, 'percentage': 2.5},
             }]
         }
+
+    # ── INT-1696 additions ───────────────────────────────────────────────────
+
+    def test_industry_accommodation_serializes_all_fields(self):
+        address = PaymentSetupAccommodationAddress()
+        address.address_line1 = '123 High Street'
+        address.city = 'London'
+        address.state = 'Greater London'
+        address.country = 'GB'
+        address.zip = 'NE1 1CK'
+
+        guest = PaymentSetupAccommodationGuest()
+        guest.first_name = 'John'
+        guest.last_name = 'Smith'
+        guest.date_of_birth = '1970-03-19'
+
+        room = PaymentSetupAccommodationRoom()
+        room.rate = 42.3
+        room.number_of_nights = 5
+        room.type = 'deluxe'
+
+        host = PaymentSetupAccommodationHost()
+        host.registration_date = '2020-01-01'
+        host.total_reservation_count = 150
+
+        accommodation = PaymentSetupAccommodation()
+        accommodation.name = 'Checkout Lodge'
+        accommodation.booking_reference = 'REF9083748'
+        accommodation.check_in_date = '2025-04-11'
+        accommodation.check_out_date = '2025-04-18'
+        accommodation.address = address
+        accommodation.number_of_rooms = 2
+        accommodation.guests = [guest]
+        accommodation.room = [room]
+        accommodation.total_number_of_guests = 2
+        accommodation.refundable = True
+        accommodation.delivery_recipient = 'jane.smith@example.com'
+        accommodation.host = host
+
+        industry = Industry()
+        industry.accommodation = [accommodation]
+
+        assert _serialize(industry) == {
+            'accommodation': [{
+                'name': 'Checkout Lodge',
+                'booking_reference': 'REF9083748',
+                'check_in_date': '2025-04-11',
+                'check_out_date': '2025-04-18',
+                'address': {
+                    'address_line1': '123 High Street',
+                    'city': 'London',
+                    'state': 'Greater London',
+                    'country': 'GB',
+                    'zip': 'NE1 1CK',
+                },
+                'number_of_rooms': 2,
+                'guests': [{'first_name': 'John', 'last_name': 'Smith', 'date_of_birth': '1970-03-19'}],
+                'room': [{'rate': 42.3, 'number_of_nights': 5, 'type': 'deluxe'}],
+                'total_number_of_guests': 2,
+                'refundable': True,
+                'delivery_recipient': 'jane.smith@example.com',
+                'host': {'registration_date': '2020-01-01', 'total_reservation_count': 150},
+            }]
+        }
+
+    def test_industry_airline_serializes_all_fields(self):
+        ticket = PaymentSetupAirlineTicket()
+        ticket.number = '0742464639523'
+        ticket.issue_date = '2025-05-01'
+        ticket.issuing_carrier_code = '042'
+        ticket.travel_package_indicator = 'A'
+        ticket.travel_agency_name = 'Checkout Travel Agents'
+        ticket.travel_agency_code = '91114362'
+
+        passenger_address = PaymentSetupAirlinePassengerAddress()
+        passenger_address.country = 'GB'
+        passenger = PaymentSetupAirlinePassenger()
+        passenger.first_name = 'John'
+        passenger.last_name = 'Smith'
+        passenger.date_of_birth = '1990-10-31'
+        passenger.address = passenger_address
+
+        leg = PaymentSetupFlightLegDetails()
+        leg.flight_number = 'BA1483'
+        leg.carrier_code = 'BA'
+        leg.class_of_travelling = 'W'
+        leg.departure_airport = 'LHR'
+        leg.departure_date = '2025-10-13'
+        leg.departure_time = '18:30'
+        leg.arrival_airport = 'JFK'
+        leg.stop_over_code = 'X'
+        leg.fare_basis_code = 'WUP14B'
+
+        price = PaymentSetupAirlineInsurancePrice()
+        price.amount = 500
+        price.currency = 'SAR'
+        insurance = PaymentSetupAirlineInsurance()
+        insurance.type = 'travel'
+        insurance.company = 'AXA'
+        insurance.price = price
+
+        airline = PaymentSetupAirline()
+        airline.ticket = ticket
+        airline.passengers = [passenger]
+        airline.flight_leg_details = [leg]
+        airline.total_number_of_passengers = 1
+        airline.travel_type = 'international'
+        airline.trip_type = 'one_way'
+        airline.refundable = True
+        airline.delivery_recipient = 'jane.smith@example.com'
+        airline.ancillaries = 'extra_baggage'
+        airline.insurance = insurance
+
+        industry = Industry()
+        industry.airline = [airline]
+
+        assert _serialize(industry) == {
+            'airline': [{
+                'ticket': {
+                    'number': '0742464639523',
+                    'issue_date': '2025-05-01',
+                    'issuing_carrier_code': '042',
+                    'travel_package_indicator': 'A',
+                    'travel_agency_name': 'Checkout Travel Agents',
+                    'travel_agency_code': '91114362',
+                },
+                'passengers': [{
+                    'first_name': 'John',
+                    'last_name': 'Smith',
+                    'date_of_birth': '1990-10-31',
+                    'address': {'country': 'GB'},
+                }],
+                'flight_leg_details': [{
+                    'flight_number': 'BA1483',
+                    'carrier_code': 'BA',
+                    'class_of_travelling': 'W',
+                    'departure_airport': 'LHR',
+                    'departure_date': '2025-10-13',
+                    'departure_time': '18:30',
+                    'arrival_airport': 'JFK',
+                    'stop_over_code': 'X',
+                    'fare_basis_code': 'WUP14B',
+                }],
+                'total_number_of_passengers': 1,
+                'travel_type': 'international',
+                'trip_type': 'one_way',
+                'refundable': True,
+                'delivery_recipient': 'jane.smith@example.com',
+                'ancillaries': 'extra_baggage',
+                'insurance': {
+                    'type': 'travel',
+                    'company': 'AXA',
+                    'price': {'amount': 500, 'currency': 'SAR'},
+                },
+            }]
+        }