On ex JP taxes & surcharges. I was curious and priced equivalent route (same airlines on each segment, AY, CX and QF) DONE4s online but one ex OSL and one ex CTS:
* SPK-HKG-SYD-AKL-JFK-xHEL-OSL-xHEL-TYO taxes & surcharges ~$1000
* OSL-xHEL-TYO,SPK-HKG-SYD-AKL-JFK-x-HEL-OSL taxes & surcharges ~$1700
Multiple Carrier Surcharges/Fees 40,500.00 JPY
Multiple Carrier Surcharges/Fees 50,160.00 JPY
Airline Insurance Surcharge 2,300.00 JPY
Passenger Service Facilities Charge - Japan 2,610.00 JPY
Tax description unavailable (TKVC) 1,000.00 JPY
Tax description unavailable (G3RE) 3,450.00 JPY
Hong Kong Air Passenger Departure Tax 2,300.00 JPY
Tax description unavailable (I5SE) 1,060.00 JPY
Australia Passenger Movement Charge 7,010.00 JPY
Australia Baggage Screening Tax - Arrival 670.00 JPY
Australian Passenger Service Charge 7,880.00 JPY
Tax description unavailable (F1CA) 3,970.00 JPY
Passenger Security Charge for New Zealand 1,540.00 JPY
Passenger Security Charge at Auckland Airport (Arrivals) 2,460.00 JPY
Passenger Security Charge at Auckland Airport (Departure) 2,460.00 JPY
September 11th Security Fee 840.00 JPY
U.S. International Transportation Tax - Departure 3,310.00 JPY
International Arrival Transportation Tax (USA) 3,310.00 JPY
U.S. Animal and Plant Inspection Service Users Fee 560.00 JPY
Immigration and Naturalization Service Fee 1,050.00 JPY
U.S. Customs Fee 1,080.00 JPY
Passenger Fee for Intl. to Intl. Transfer Finland 1,820.00 JPY
Tax description unavailable (XUAV) 300.00 JPY
Tax description unavailable (G2AP) 4,600.00 JPY
Tax description unavailable (ZNAE) 1,620.00 JPY
Passenger Facility Charges 670.00 JPY
Total 148,530.00 x 1 = 148,530.00 JPY
Airline Insurance Surcharge
354.00 NOK
Multiple Carrier Surcharges/Fees
1,214.00 NOK
Carrier Surcharge/Fee
13,497.00 NOK
Tax description unavailable (G2AP)
332.00 NOK
Tax description unavailable (ZNAE)
117.00 NOK
Passenger Fee for Intl. to Intl. Transfer Finland
130.00 NOK
Tax description unavailable (XUAV)
22.00 NOK
Passenger Service Facilities Charge - Japan
189.00 NOK
Tax description unavailable (TKVC)
72.00 NOK
Tax description unavailable (G3RE)
249.00 NOK
Hong Kong Air Passenger Departure Tax
166.00 NOK
Tax description unavailable (I5SE)
76.00 NOK
Australia Passenger Movement Charge
507.00 NOK
Australia Baggage Screening Tax - Arrival
48.00 NOK
Australian Passenger Service Charge
568.00 NOK
Tax description unavailable (F1CA)
286.00 NOK
Passenger Security Charge for New Zealand
111.00 NOK
Passenger Security Charge at Auckland Airport (Arrivals)
197.00 NOK
Passenger Security Charge at Auckland Airport (Departure)
177.00 NOK
September 11th Security Fee
60.00 NOK
U.S. Animal and Plant Inspection Service Users Fee
40.00 NOK
Immigration and Naturalization Service Fee
75.00 NOK
U.S. Customs Fee
77.00 NOK
Passenger Facility Charges
48.00 NOK
Total
18,612.00 x 1 = 18,612.00 NOK
I then did the DONE3 (AY, CX only) version which was just confusing as ex OSL was cheaper (I have the pricing PDF to refer to so pretty sure I didn't make a mistake, maybe the online tool did):
* SPK-HKG-JFK-xHEL-OSL-xHEL-TYO taxes & surcharges ~$800
* OSL-xHEL-TYO,SPK-HKG-JFK-xHEL-OSL taxes & surcharges ~$575
Multiple Carrier Surcharges/Fees 40,500.00 JPY
Airline Insurance Surcharge 2,300.00 JPY
Multiple Carrier Surcharges/Fees 47,420.00 JPY
Passenger Service Facilities Charge - Japan 2,610.00 JPY
Tax description unavailable (TKVC) 1,000.00 JPY
Tax description unavailable (G3RE) 3,450.00 JPY
Hong Kong Air Passenger Departure Tax 2,300.00 JPY
Tax description unavailable (I5SE) 1,060.00 JPY
September 11th Security Fee 840.00 JPY
U.S. International Transportation Tax - Departure 3,310.00 JPY
International Arrival Transportation Tax (USA) 3,310.00 JPY
U.S. Animal and Plant Inspection Service Users Fee 560.00 JPY
Immigration and Naturalization Service Fee 1,050.00 JPY
U.S. Customs Fee 1,080.00 JPY
Passenger Fee for Intl. to Intl. Transfer Finland 1,820.00 JPY
Tax description unavailable (XUAV) 300.00 JPY
Tax description unavailable (G2AP) 4,600.00 JPY
Tax description unavailable (ZNAE) 1,620.00 JPY
Passenger Facility Charges 670.00 JPY
Total 119,800.00 x 1 = 119,800.00 JPY
Airline Insurance Surcharge 354.00 NOK
Multiple Carrier Surcharges/Fees 2,958.00 NOK
Multiple Carrier Surcharges/Fees 1,214.00 NOK
Tax description unavailable (G2AP) 332.00 NOK
Tax description unavailable (ZNAE) 117.00 NOK
Passenger Fee for Intl. to Intl. Transfer Finland 130.00 NOK
Tax description unavailable (XUAV) 22.00 NOK
Passenger Service Facilities Charge - Japan 189.00 NOK
Tax description unavailable (TKVC) 72.00 NOK
Tax description unavailable (G3RE) 249.00 NOK
Hong Kong Air Passenger Departure Tax 166.00 NOK
Tax description unavailable (I5SE) 76.00 NOK
September 11th Security Fee 60.00 NOK
U.S. Animal and Plant Inspection Service Users Fee 40.00 NOK
Immigration and Naturalization Service Fee 75.00 NOK
U.S. Customs Fee 77.00 NOK
Passenger Facility Charges 48.00 NOK
Total 6,179.00 x 1 = 6,179.00 NOK
(I also priced out an itinerary I'm actually flying ex Japan which is exclusively CX and QR except 3 domestic AA segments, and ex Japan is a slim saving of $1050 in taxes & surcharges vs $1250 if flown ex USA)