Django query filtered data from database based on GET request

I'm learning django and want to query data based on the request by the user. Here is my code:

models.py:

class Airline(models.Model):
    name = models.CharField(max_length=10, blank=True, null=True)
    code = models.CharField(max_length=2, blank=True, null=True)

class FinancialData(models.Model): 
    airline = models.ForeignKey(Airline)
    mainline_revenue = models.DecimalField(max_digits=7, decimal_places=2)
    regional_revenue = models.DecimalField(max_digits=7, decimal_places=2)
    other_revenue = models.DecimalField(max_digits=7, decimal_places=2)
    total_revenue = models.DecimalField(max_digits=7, decimal_places=2)

urls.py:

urlpatterns = [
    url(r'^airline/(?P<pk>\d+)/$', views.airlinesdata, name='airline_data'),
]

views.py:

def airlinedata(request):
    data = FinancialData.objects.filter(pk=airline_id)
    return data

I am not sure what I should write in views.py that when a user select for example airline_id of 3, it retrieves FinancialData from the database for that airline only using the foreign key?