How to read parameters from the URL and search for it?

I have an index of all flights that is displayed at http://localhost:4200/flights

How can I create a Kayak like experience where the URL http://localhost:4200/flights/FRA-JFK would display only the flights from FRA to JFK?

The setup:

ember new travel_app
ember g http-mock flight
ember g adapter application
ember g resource flights

app/models/flight.js

import DS from 'ember-data';

export default DS.Model.extend({
  from: DS.attr('string'),
  to: DS.attr('string'),
  code: DS.attr('string')
});

app/routes/flights.js

import Ember from 'ember';

export default Ember.Route.extend({
  model: function() {
    return this.store.find('flight');
  }
});

app/templates/flights.hbs

List of flights:

<ul>
{{#each flight in model}}
<li>{{flight.code}} {{flight.from}} - {{flight.to}}</li>
{{/each}}
</ul>

server/mocks/flights.js

module.exports = function(app) {
  var express = require('express');
  var flightsRouter = express.Router();

  var items = [
    {
      id: 1,
      from: "FRA",
      to: "JFK",
      code: "LH 400"
    },
    {
      id: 2,
      from: "JFK",
      to: "FRA",
      code: "LH 401"
    }
  ];

  flightsRouter.get('/', function(req, res) {
    res.send({
      'flights': items
    });
  });

[...]

app/adapters/application.js

import DS from 'ember-data';

export default DS.RESTAdapter.extend({
  'namespace': 'api'
});