Flights Chicago → San José (Alajuela)
As of November 2026, economy flights from Chicago to San José (Alajuela) have a typical range USD 639–1182, median USD 905. Full range across all 227 offers: USD 444–4453. We analyzed 227 offers from 12 airlines in a single price check.
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Chicago → San José (Alajuela)
Based on 227 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Chicago → San José (Alajuela)
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Avianca | USD 110 | — | — |
| Copa Airlines | Included | USD 40 | — |
| Air Canada | Included | USD 30 | — |
| United | Included | USD 35 | — |
| Southwest | Included | USD 90 | — |
| Frontier | — | — | — |
| JetBlue | Included | — | — |
| Delta | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Chicago to San José (Alajuela) cost?
Based on 227 offers · November 2026
Chicago to San José (Alajuela) flights ranged from USD 444 to USD 4453 across 227 offers analyzed in November 2026. The chart below shows how prices distributed across all 227 offers.
These 227 offers (November 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 738 and USD 1085
What hidden fees do Chicago to San José (Alajuela) flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Chicago to San José (Alajuela) routes. The breakdown below is based on 227 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| AV | 35 | 4% |
| CM | 55 | 9% |
| AC | 35 | 4% |
| UA | 43 | 5% |
| WN | 90 | 9% |
| F9 | 10 | 1% |
| B6 | 10 | 1% |
| DL | 41 | 3% |
| AA | 45 | 4% |
Copa Airlines: base ~USD 583 + fees USD 55 = ~USD 638 total. Frontier Airlines: base ~USD 852 + fees USD 10 = ~USD 862 total.
Copa Airlines's USD 55 ancillary fees narrow the gap with Frontier Airlines's lower-fee model — the USD 269 base difference shrinks to USD 224 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.WN charges 9.0x more in ancillary fees than B6 on this route. Compare total-cost options when booking.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Chicago to San José (Alajuela)?
12 airlines flew Chicago to San José (Alajuela) in this dataset. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 COPA | 1 | — | 544 | n/a |
 Avianca | 1 | — | 631 | n/a |
 Copa Airlines | 27 | 503–781 | 638 | 55 (9%) |
 Air Canada | 26 | 677–1126 | 809 | 35 (4%) |
 United Airlines | 46 | 678–1097 | 833 | 43 (5%) |
 Frontier Airlines | 4 | 803–921 | 862 | 10 (1%) |
 Southwest | 4 | — | 919 | n/a |
 Avianca | 42 | 632–1590 | 957 | 35 (4%) |
 B6 | 4 | 822–1108 | 968 | 10 (1%) |
 Delta Air Lines | 51 | 825–3083 | 1003 | 41 (4%) |
 Southwest Airlines | 4 | 828–1191 | 1028 | 90 (9%) |
 American Airlines | 17 | 1067–1174 | 1169 | 45 (4%) |
Where do the best Chicago → San José (Alajuela) prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Chicago to San José (Alajuela) flights
- Full-service carriers on Chicago–San José (Alajuela) cost 0.9x more than budget airlines (USD 823 vs USD 944 median; overall median USD 905).
- WN charges 9.0x more in ancillary fees than B6 — USD 90 vs USD 10 avg per booking.
- The same route priced USD 507 apart depending on where it was booked — the lowest median was USD 609. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Chicago to San José (Alajuela) cost?
- Based on 227 offers analyzed, Chicago to San José (Alajuela) flights range from USD 444 to USD 4453, with a median price of USD 905. Search for your specific dates →
- What hidden fees should I expect on Chicago to San José (Alajuela) flights?
- On average, ancillary fees (bags, seat selection) add USD 41 to the base fare on Chicago to San José (Alajuela) flights. See itemized fees for your itinerary →
- Which airline is cheapest on Chicago to San José (Alajuela) including all fees?
- COPA has the lowest median fare on Chicago to San José (Alajuela) at USD 544 (median across 1 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Chicago–San José (Alajuela) flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 609. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Chicago to San José (Alajuela) routes?
- Chicago to San José (Alajuela) has 12 airlines competing, creating a price range from USD 444 to USD 4453 across 227 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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