As I tried to tell you it is not where you start the journey, it is where the ticket is 'Plated" from, and apparently Delta is platting all there ex Argentina tickets from Argentina, hence the 35% charge(which isn't really 35%, as it is 35% on just the base fares not on any taxes or fuel surcharges) see the two examples below for the identical flights, the only difference is that the Delta flights sold by Expedia are plated ex US, and don't include the 35% tax withholding.
[font=Lucida Grande'] YOU SELECTED THESE FLIGHTS:
[/font]
OUTBOUND
Tue, 08 Apr 2014
|
8:25PM
LAX
| 1-Stop
|
EZE
10:40AM
[background=rgb(251, 234, 201)]Wednesday 09 Apr[/background]
ATLChange Planes
View Seats
Complete Delta Air Lines Baggage Information
RETURN
Tue, 22 Apr 2014
|
10:30AM
EZE
| 1-Stop
|
DL 101
Show Details
10:30AM
EZE
1-Stop
17 hr 50 min
DL 1754
Economy (X)
View Seats
Complete Delta Air Lines Baggage Information
[font=Lucida Grande']In-Flight services and amenities may vary and are subject to change.[/font]
[font=Lucida Grande']Final baggage fees will be assessed and charged at time of check-in.
Baggage fees may change based on the class of service or frequent flyer status.[/font]
[font=Lucida Grande']All prices are (USD) unless otherwise noted.
If your itinerary qualifies for trip insurance, you will be able to add it before you purchase your ticket.
PRICE PER PASSENGER: $1,111.00 (USD) TAXES, FEES AND CHARGES: $563.82 (USD) TOTAL PER PASSENGER: $1,674.82(USD)
TOTAL FOR ALL PASSENGERS(1):
[background=transparent]This amount will appear in full on your statement[/background] $1,674.82 (USD
LeaveTue, Apr 8Total time: 18hr 15min
Depart
8:25 PM
Buenos Aires , Argentina
Ministro Pistarini (EZE) Terminal C
Stop 1
5:50 AM
Atlanta, GA , United States
Hartsfield-Jackson Airport (ATL) Terminal I
[background=rgb(254, 247, 173)]No change of planes. Time between flights: 2hr 47min[/background]
[background=rgb(254, 247, 173)]Stops: 1[/background]
Delta Air Lines 110
Economy
5,011 mi 10hr 25min
Seat map
Depart
8:37 AM
Atlanta, GA , United States
Hartsfield-Jackson Airport (ATL) Terminal S
Arrive
10:40 AM
Los Angeles, CA , United States
Los Angeles Airport, El Segundo (LAX) Terminal 5
Delta Air Lines 110
Economy Boeing 767
On-time performance: 70%
1,943 mi 5hr 3min
Meal: Food for purchaseSeat map
[background=rgb(254, 247, 173)]This is an overnight flight, which will arrive one (1) day later.[/background]
ReturnTue, Apr 22Total time: 17hr 50min
Depart
10:30 AM
Los Angeles, CA , United States
Los Angeles Airport, El Segundo (LAX) Terminal 5
Stop 1
5:34 PM
Atlanta, GA , United States
Hartsfield-Jackson Airport (ATL) Terminal S
[background=rgb(254, 247, 173)]Change of planes. Time between flights: 3hr 36min[/background]
Delta Air Lines 1754
Economy Boeing 777
On-time performance: 70%
1,943 mi 4hr 4min
Meal: Food for purchaseSeat map
Depart
9:10 PM
Atlanta, GA , United States
Hartsfield-Jackson Airport (ATL) Terminal I
Arrive
8:20 AM
Buenos Aires , Argentina
Ministro Pistarini (EZE) Terminal C
Delta Air Lines 101
Economy
5,011 mi 10hr 10min
Seat map Flight Airline Ticket(1) $1,290.42 (Adult: 1) Total due at booking $1,290.42 Taxes and fees included
Prices listed are in USD unless noted.
Additional baggage fees and entry/exit feesmay apply.
[background=rgb(254, 247, 173)]This is an overnight flight, which will arrive one (1) day later.[/background][/font]
So as you can plainly see her the same flights are $1674.82 from delta, Or $1,280.37 if you buy them from expedia, the only difference is delta is plating the tickets ex Argentina, and collecting the 35% tax withholding on the base fare, whereas Expedia is plating it ex US, and is not subject to the 35% tax withholding
P.S. sorry the flight info didn't paste in the cleanest format, if you want you can go to Kayak, and enter your flight data click through to Delta for their price, and also click through to compare from expedia, etc, and then maybe you will finally understand what i am trying to tell you